TestLaravel/app/Services/moneyService.php

<?php

namespace App\Services;

use Illuminate\Support\Str;

class moneyService
{
    public function multiply2($money){
        $random =  rand(1, 10);
        if($random % 2 == 0){
            $money=$money*2;
        }
        else{
            $money=0;
        }
        return $money;
    }
}