import java.util.Scanner;

class Main {
	public static void main(String[] args) {
        Scanner stdIn = new Scanner(System.in);
        int total = 0;
        int A = stdIn.nextInt();
        int B = stdIn.nextInt();
        int T = stdIn.nextInt();
        for(int i=1;;i++) {
        	if((T-i*A)>=0)
        		total += B;
        	else
        		break;
        } 
        System.out.println(total);
	}
}
/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