"use strict";

function Main(in_input){
    // Modify Input
    var in_lines = in_input.split("\n");
    var in_line1 = in_lines[0].split(" ");
    var a = parseInt(in_line1[0], 10);
    var b = parseInt(in_line1[1], 10);
    var t = parseInt(in_line1[2], 10);

    // Calc Answer
    var ans = Math.floor(t / a) * b;

    // Output
    console.log(ans)
}

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