Child controller for calling function from another controller

ChildController.php

<?php

namespace App\Http\Controllers;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;

class ChildController extends Controller
{
    
    /**
     * Common function using on multiple controller
     */
    public function Calculation($firstNumber, $operator, $secondnumber){

        if($operator == '+'){
            $response = $firstNumber + $secondnumber;
        }elseif($operator == '-'){
            $response = $firstNumber - $secondnumber;
        }elseif($operator == '*'){
            $response = $firstNumber * $secondnumber;
        }elseif($operator == '/'){
            $response = $firstNumber / $secondnumber;
        }
        
        return $response;
    }

}