import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {
	public static void main(String[] args) throws NumberFormatException, IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		String str = br.readLine();

		int A = Integer.parseInt(str.split(" ")[0]);
		int B = Integer.parseInt(str.split(" ")[1]);
		int t = Integer.parseInt(str.split(" ")[2]);


		int bcount = (t-(t%A))/A;

		System.out.println(bcount*B);

	}

}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz