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)

#![allow(unused_imports)]
#![allow(dead_code)]

mod reader {
    use std;

    macro_rules! read_line {
        () => {{
            let mut input = String::new();
            std::io::stdin().read_line(&mut input).unwrap();
            input
        }};
    }

    pub fn read_to_vec<T: std::str::FromStr>() -> Vec<T> {
        read_line!().split_whitespace()
            .map(|e| e.parse().ok().unwrap())
            .collect()
    }
}

#[macro_use]
mod misc {
    #[macro_export]
    macro_rules! bind_from_vec {
        ( $($variable:ident),+ = $vector:expr ) => {
            let mut v = $vector.clone().into_iter();
            $(let $variable = v.next().unwrap();)+
        };
    }
}

use reader::*;
use misc::*;

fn main() {
    bind_from_vec!(a, b, t = read_to_vec::<i32>());

    println!("{}", t / a * b)
}