"use strict";
function main(input) {
    const args = input.split(" ");

    const A = parseInt(args[0]);
    const B = parseInt(args[1]);
    const T = parseInt(args[2]);

    const count = Math.floor(T/A);

    console.log(count * B);
}
main(require("fs").readFileSync("/dev/stdin", "utf8"));
