Pi

#!/usr/bin/env python3

import math

lowest_value=1

for number in range(100, 10001):
    lower_limit = int(number // 3.2)
    upper_limit = int(number // 3.1 + 1)
    for divisor in range(lower_limit, upper_limit):
        division_result = number / divisor
        subtraction_result = division_result - math.pi
        absolute_value = abs(subtraction_result)
        if absolute_value < lowest_value:
            lowest_value = absolute_value
            print(number, "/", divisor, "=", '{0:.9f}'.format(division_result), end="\n")

# 100 / 31 = 3.225806452
# 100 / 32 = 3.125000000
# 101 / 32 = 3.156250000
# 104 / 33 = 3.151515152
# 107 / 34 = 3.147058824
# 110 / 35 = 3.142857143
# 179 / 57 = 3.140350877
# 201 / 64 = 3.140625000
# 223 / 71 = 3.140845070
# 245 / 78 = 3.141025641
# 267 / 85 = 3.141176471
# 289 / 92 = 3.141304348
# 311 / 99 = 3.141414141
# 333 / 106 = 3.141509434
# 355 / 113 = 3.141592920