#!/usr/bin/env python3

if __name__ == '__main__':
    total = 0
    with open("input", "r", encoding="utf-8") as sheet:
        remainder = []
        for line in sheet:
            values = list(map(int, line.split()))
            values.sort()
            result = ""
            i = 1
            while i < len(values) and result == "":
                j = 0
                while j >= 0 and j < i and result == "":
                    remainder = values[i] % values[j]
                    if remainder == 0:
                        result = int(values[i] / values[j])
                    j += 1
                i += 1
            total += result
    print(total)