https://www.acmicpc.net/problem/15726
using System;
class Program
{
static void Main() {
string[] s=Console.ReadLine().Split(" ");
double a=double.Parse(s[0]);
double b=double.Parse(s[1]);
double c=double.Parse(s[2]);
int sum=(int)(a*b/c);
int sum1=(int)(a/b*c);
Console.Write(Math.Max(sum,sum1));
}
}