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 (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

func main() {
	s := bufio.NewScanner(os.Stdin)
	s.Scan()
	line := s.Text()

	sped := strings.Split(line, " ")
	a, b, t := stoi(sped[0]), stoi(sped[1]), stoi(sped[2])

	sum := 0
	for i := 0; i < t; i++ {
		if (i+1)%a == 0 {
			sum += b
		}
	}
	fmt.Println(sum)
}

func stoi(s string) int {
	res, err := strconv.Atoi(s)
	if err != nil {
		panic(err)
	}
	return res
}