Multiplying ints on PHP?

Question

I am trying to multiply these two ints together.

        $value = calculateCateringCosts($i, $db);//int 1
        echo "<td>$value * $partySize</td>";

However this is the result I get: 20 * 150

Answer 1

    $value = calculateCateringCosts($i, $db);//int 1
    echo "<td>".($value * $partySize)."</td>";