using namespace std;
#include <bits/stdc++.h>
int EET(int a,int b,int *x,int *y) {
    if(b==0) {
        *x=1;
        *y=0;
        return a;
    }
    int x1;
    int y1;
    int d = EET(b,a%b,&x1,&y1);
    *x = y1;
    *y = x1-(a/b)*y1;
    return d;
}
int main() {
    int a,b,c,x1,x2,y1,y2;
    cin>>a>>b>>c>>x1>>x2>>y1>>y2;
    c*=-1;
    //ax + by = c

    int x;
    int y;
    int d = EET(a,b,&x,&y);
    if(c%d!=0) {cout<<0<<endl; return 0; }
    int xf = (x*c)/d;
    int yf = (y*c)/d;
      if (a < 0) xf= -xf;
    if (b < 0) yf = -yf;
    int xff=xf;
    int yff=yf;
    //shift by b/d,-a/d
    int count=0;
    //right shift
    if(xff<=x2&&xff>=x1&&yff<=y2&&yff>=y1) count++;
    while(xff<=x2&&yff>=y1) {
  if(xff+b/d<=x2&&yff-a/d>=y1){
    xff+=b/d;
    yff-=a/d;
    count++;
  }  else { break; }
    }
  //  count--;
    xff=xf;
    yff=yf;


      while(xff>=x1&&yff<=y2) {
 if(xff-b/d>=x1&&yff+a/d<=y2){
    xff-=b/d;
    yff+=a/d;
    count++;
 } else { break; }

    }
  //  count--;
    cout<<count<<endl;
    return 0;
}