"use strict";

function Main(input) {
    input = input.split("\n");

    input[0] = input[0].split(" ");
    const A = parseInt(input[0][0], 10);
    const B = parseInt(input[0][1], 10);
    const T = parseInt(input[0][2], 10);

    const answer = Math.floor((T + 0.5) / A) * B;

    console.log(answer);
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));
