<?php

​

function f(int $a, float $b): float {

    return $a / $b;

}

​

function g(int $a, float $b): float {

    return $b / $a;

}

​

function h(int $a, int $b): float {

    return $a / $b;

}

​

function i(int $a, float $b): float {

    return $a * $b;

}

​

function j(int $a, float $b): float {

    return $b * $a;

}