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.

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.

Constraints

• All values in input are integers.
• $1 \leq A, B, T \leq 20$

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

见题面 Input 部分

见题面 Output 部分