"use strict";
process.stdin.resume();
process.stdin.setEncoding("utf8");
var reader = require("readline").createInterface({
  input: process.stdin,
  output: process.stdout
});

reader.on("line", line => {
  const lines = line.split(/\s/).map(i => parseInt(i));
  const a = lines[0], b = lines[1], t = lines[2];
  console.log(parseInt(t / a) * b);
});
