<?php

$numberSteps = (int)readline();
$numberOfDancers = (int)readline();
$numberDays = (int)readline();
$result = '';

$percentStepsOfDays = ($numberSteps / $numberDays) / $numberSteps;
$percentStepsOfDaysEnd = ceil($percentStepsOfDays * 100); //Закръляш процентите
$stepsForOneDancer = $percentStepsOfDaysEnd / $numberOfDancers;
//$up = ceil($stepsForOneDancer); Това е ненужно


if ($percentStepsOfDaysEnd <= 13) {
    $result = sprintf('%.02f', $stepsForOneDancer);
    echo "Yes, they will succeed in that goal! {$result}%.";
}
else  {
    $result = sprintf('%.02f', $stepsForOneDancer);
    echo "No, they will not succeed in that goal! Required {$result}% steps to be learned per day.";
}