- bcsub: documentation ( source)
- var_dump: documentation ( source)
- bcmul: documentation ( source)
- bcdiv: documentation ( source)
<?php
$normal = '0.00000601';
$direct = bcmul($normal, '3', 8);
$referral = bcdiv($normal, '4', 8);
$difference = bcsub(bcsub($normal, $direct, 8), $referral, 8);
var_dump($direct, $referral, bcmul($difference, 30000 * 31, 8));