Multiplication through addition

X = a register capable of doing addition
Y = a register that X can add to itself

Copy X to Y and add the sequence of registers to X for your chosen number to multiply by it:
  2 - x
  3 - xy
  4 - xx
  5 - xxy
  6 - xyx
  7 - xyxy
  8 - xxx
  9 - xxxy
 10 - xxyxy
 11 - xxyxyy
 12 - xyxx
 13 - xyxxy
 14 - xyxyx
 15 - xyxyxy
 16 - xxxx
 17 - xxxxy
 18 - xxxyx
 19 - xxxyxy
 20 - xxyxyx
 21 - xxyxyxy
 22 - xxyxyyx
 23 - xxyxyyxy
 24 - xyxxx
 25 - xyxxxy
 26 - xyxxyx
 27 - xyxxyxy
 28 - xyxyxx
 29 - xyxyxxy
 30 - xyxyxyx
 31 - xyxyxyxy
 32 - xxxxx
 33 - xxxxxy
 34 - xxxxyx
 35 - xxxxyxy
 36 - xxxyxx
 37 - xxxyxxy
 38 - xxxyxyx
 39 - xxxyxyxy
 40 - xxyxyxx
 41 - xxyxyxxy
 42 - xxyxyxyx
 43 - xxyxyxyxy
 44 - xxyxyyxx
 45 - xxyxyyxxy
 46 - xxyxyyxyx
 47 - xxyxyyxyxy
 48 - xyxxxx
 49 - xyxxxxy
 50 - xyxxxyx
 51 - xyxxxyxy
 52 - xyxxyxx
 53 - xyxxyxxy
 54 - xyxxyxyx
 55 - xyxxyxyxy
 56 - xyxyxxx
 57 - xyxyxxxy
 58 - xyxyxxyx
 59 - xyxyxxyxy
 60 - xyxyxyxx
 61 - xyxyxyxxy
 62 - xyxyxyxyx
 63 - xyxyxyxyxy
 64 - xxxxxx
 65 - xxxxxxy
 66 - xxxxxyx
 67 - xxxxxyxy
 68 - xxxxyxx
 69 - xxxxyxxy
 70 - xxxxyxyx
 71 - xxxxyxyxy
 72 - xxxyxxx
 73 - xxxyxxxy
 74 - xxxyxxyx
 75 - xxxyxxyxy
 76 - xxxyxyxx
 77 - xxxyxyxxy
 78 - xxxyxyxyx
 79 - xxxyxyxyxy
 80 - xxyxyxxx
 81 - xxyxyxxxy
 82 - xxyxyxxyx
 83 - xxyxyxxyxy
 84 - xxyxyxyxx
 85 - xxyxyxyxxy
 86 - xxyxyxyxyx
 87 - xxyxyxyxyxy
 88 - xxyxyyxxx
 89 - xxyxyyxxxy
 90 - xxyxyyxxyx
 91 - xxyxyyxxyxy
 92 - xxyxyyxyxx
 93 - xxyxyyxyxxy
 94 - xxyxyyxyxyx
 95 - xxyxyyxyxyxy
 96 - xyxxxxx
 97 - xyxxxxxy
 98 - xyxxxxyx
 99 - xyxxxxyxy
100 - xyxxxyxx
101 - xyxxxyxxy
102 - xyxxxyxyx
103 - xyxxxyxyxy
104 - xyxxyxxx
105 - xyxxyxxxy
106 - xyxxyxxyx
107 - xyxxyxxyxy
108 - xyxxyxyxx
109 - xyxxyxyxxy
110 - xyxxyxyxyx
111 - xyxxyxyxyxy
112 - xyxyxxxx
113 - xyxyxxxxy
114 - xyxyxxxyx
115 - xyxyxxxyxy
116 - xyxyxxyxx
117 - xyxyxxyxxy
118 - xyxyxxyxyx
119 - xyxyxxyxyxy
120 - xyxyxyxxx
121 - xyxyxyxxxy
122 - xyxyxyxxyx
123 - xyxyxyxxyxy
124 - xyxyxyxyxx
125 - xyxyxyxyxxy
126 - xyxyxyxyxyx
127 - xyxyxyxyxyxy
128 - xxxxxxx
129 - xxxxxxxy
130 - xxxxxxyx
131 - xxxxxxyxy
132 - xxxxxyxx
133 - xxxxxyxxy
134 - xxxxxyxyx
135 - xxxxxyxyxy
136 - xxxxyxxx
137 - xxxxyxxxy
138 - xxxxyxxyx
139 - xxxxyxxyxy
140 - xxxxyxyxx
141 - xxxxyxyxxy
142 - xxxxyxyxyx
143 - xxxxyxyxyxy
144 - xxxyxxxx
145 - xxxyxxxxy
146 - xxxyxxxyx
147 - xxxyxxxyxy
148 - xxxyxxyxx
149 - xxxyxxyxxy
150 - xxxyxxyxyx
151 - xxxyxxyxyxy
152 - xxxyxyxxx
153 - xxxyxyxxxy
154 - xxxyxyxxyx
155 - xxxyxyxxyxy
156 - xxxyxyxyxx
157 - xxxyxyxyxxy
158 - xxxyxyxyxyx
159 - xxxyxyxyxyxy
160 - xxyxyxxxx
161 - xxyxyxxxxy
162 - xxyxyxxxyx
163 - xxyxyxxxyxy
164 - xxyxyxxyxx
165 - xxyxyxxyxxy
166 - xxyxyxxyxyx
167 - xxyxyxxyxyxy
168 - xxyxyxyxxx
169 - xxyxyxyxxxy
170 - xxyxyxyxxyx
171 - xxyxyxyxxyxy
172 - xxyxyxyxyxx
173 - xxyxyxyxyxxy
174 - xxyxyxyxyxyx
175 - xxyxyxyxyxyxy
176 - xxyxyyxxxx
177 - xxyxyyxxxxy
178 - xxyxyyxxxyx
179 - xxyxyyxxxyxy
180 - xxyxyyxxyxx
181 - xxyxyyxxyxxy
182 - xxyxyyxxyxyx
183 - xxyxyyxxyxyxy
184 - xxyxyyxyxxx
185 - xxyxyyxyxxxy
186 - xxyxyyxyxxyx
187 - xxyxyyxyxxyxy
188 - xxyxyyxyxyxx
189 - xxyxyyxyxyxxy
190 - xxyxyyxyxyxyx
191 - xxyxyyxyxyxyxy
192 - xyxxxxxx
193 - xyxxxxxxy
194 - xyxxxxxyx
195 - xyxxxxxyxy
196 - xyxxxxyxx
197 - xyxxxxyxxy
198 - xyxxxxyxyx
199 - xyxxxxyxyxy
200 - xyxxxyxxx
201 - xyxxxyxxxy
202 - xyxxxyxxyx
203 - xyxxxyxxyxy
204 - xyxxxyxyxx
205 - xyxxxyxyxxy
206 - xyxxxyxyxyx
207 - xyxxxyxyxyxy
208 - xyxxyxxxx
209 - xyxxyxxxxy
210 - xyxxyxxxyx
211 - xyxxyxxxyxy
212 - xyxxyxxyxx
213 - xyxxyxxyxxy
214 - xyxxyxxyxyx
215 - xyxxyxxyxyxy
216 - xyxxyxyxxx
217 - xyxxyxyxxxy
218 - xyxxyxyxxyx
219 - xyxxyxyxxyxy
220 - xyxxyxyxyxx
221 - xyxxyxyxyxxy
222 - xyxxyxyxyxyx
223 - xyxxyxyxyxyxy
224 - xyxyxxxxx
225 - xyxyxxxxxy
226 - xyxyxxxxyx
227 - xyxyxxxxyxy
228 - xyxyxxxyxx
229 - xyxyxxxyxxy
230 - xyxyxxxyxyx
231 - xyxyxxxyxyxy
232 - xyxyxxyxxx
233 - xyxyxxyxxxy
234 - xyxyxxyxxyx
235 - xyxyxxyxxyxy
236 - xyxyxxyxyxx
237 - xyxyxxyxyxxy
238 - xyxyxxyxyxyx
239 - xyxyxxyxyxyxy
240 - xyxyxyxxxx
241 - xyxyxyxxxxy
242 - xyxyxyxxxyx
243 - xyxyxyxxxyxy
244 - xyxyxyxxyxx
245 - xyxyxyxxyxxy
246 - xyxyxyxxyxyx
247 - xyxyxyxxyxyxy
248 - xyxyxyxyxxx
249 - xyxyxyxyxxxy
250 - xyxyxyxyxxyx
251 - xyxyxyxyxxyxy
252 - xyxyxyxyxyxx
253 - xyxyxyxyxyxxy
254 - xyxyxyxyxyxyx
255 - xyxyxyxyxyxyxy