var lines = [];
var reader = require('readline').createInterface({
    input: process.stdin,
    output: process.stdout
});
reader.on('line', (line) => {
    lines.push(line);
});
reader.on('close', () => {
    l = lines[0].split(' ');
    var a, b, t
    a = parseInt(l[0]);
    b = parseInt(l[1]);
    t = parseInt(l[2]);
    console.log(Math.floor(t / a) * b);
});