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 Go (1.6) (judge verdict: Accepted)

package main

import (
	"fmt"
	"io"
	"os"
)

func answer(reader io.Reader, writer io.Writer) {
	var a, b, t int
	_, _ = fmt.Fscan(reader, &a)
	_, _ = fmt.Fscan(reader, &b)
	_, _ = fmt.Fscan(reader, &t)
	v := b * int((float64(t)+0.5)/float64(a))
	_, _ = fmt.Fprintf(writer, "%d", v)
}

func main() {
	answer(os.Stdin, os.Stdout)
}