Exam - 17 July 2016 - 02. Harvest

<?php
$vineyard = intval(readline());
$grapеKilograms = readline();
$neededWine = intval(readline());
$numWorkers = intval(readline());
$totalGrape = $vineyard * $grapеKilograms;
$wine = 40/100 * $totalGrape / 2.5;
$remainderWine = $neededWine - $wine;
if($wine >= $neededWine){
    echo "Good harvest this year! Total wine: ".floor($wine)." liters."."\n";
    echo abs(floor($remainderWine))." liters left -> ".abs(floor($remainderWine / $numWorkers)). " liters per person.";
}
else {
    echo "It will be a tough winter! More ".abs(floor($remainderWine))." liters wine needed.";
}