function Main(input){
	inputs = input.split(' ');
    X = inputs.map(inputs=>parseInt(inputs,10));
    A = X[0];
    B = X[1];
    T = X[2];
    multiple = Math.floor(T / A);
    ans = multiple * B;
    console.log(ans);
}
Main(require("fs").readFileSync("/dev/stdin","utf8"));