function main(input) {
  const formatted_input = input.split(' ').map(x => parseInt(x));

  const A = formatted_input[0];
  const B = formatted_input[1];
  const T = formatted_input[2];

  var TT = T+0.5;
  TT = TT - TT%A;

  var result = (TT/A)*B;
  result = parseInt(result, 10);

  console.log(result);
}

main(require('fs').readFileSync('/dev/stdin', 'utf8'));


