Problem:
Score : 100 points

Problem Statement

A biscuit making machine produces B biscuits at the following moments: A seconds, 2A seconds, 3A seconds and each subsequent multiple of A seconds after activation.

Find the total number of biscuits produced within T + 0.5 seconds after activation.

Constraints

All values in input are integers.

1 \leq A, B, T \leq 20

Input

Input is given from Standard Input in the following format:

A B T

Output

Print the total number of biscuits produced within T + 0.5 seconds after activation.

Sample Input 1

3 5 7

Sample Output 1

10

Five biscuits will be produced three seconds after activation.

Another five biscuits will be produced six seconds after activation.

Thus, a total of ten biscuits will be produced within 7.5 seconds after activation.

Sample Input 2

3 2 9

Sample Output 2

6

Sample Input 3

20 20 19

Sample Output 3

0

Solution in Rust (1.15.1) (judge verdict: Accepted)

use std::io;

fn read() -> String {
  let mut s = String::new();
  io::stdin().read_line(&mut s).unwrap();
  s.trim_right().to_string()
}

fn main() {
  let tmp = read();
  let mut buf = tmp.split_whitespace();
  let a: i32 = buf.next().unwrap().parse().unwrap();
  let b: i32 = buf.next().unwrap().parse().unwrap();
  let t: i32 = buf.next().unwrap().parse().unwrap();
  println!("{}", t / a * b)
}