
"use strict";

process.stdin.resume();
process.stdin.setEncoding('utf8');

var g_input = '';
process.stdin.on('data', function(chunk) {
    g_input += chunk;
});

process.stdin.on('end', function() {
    Main(g_input.split(/\r?\n/));
});

function Main(input) {

    const tokens = input[0].split(' ').map(function(value) { return parseInt(value, 10); });
    const a = tokens[0];
    const b = tokens[1];
    const t = tokens[2];

    const ans = Math.floor(t / a) * b;

    console.log(ans);

    return 0;
}
