Warning: require(C:\xampp\htdocs\web\old\it1\amd1/calc.php): failed to open stream: No such file or directory in C:\xampp\htdocs\web\old\it1\amd1\result3.php on line 2

Fatal error: require(): Failed opening required 'C:\xampp\htdocs\web\old\it1\amd1/calc.php' (include_path='C:\xampp\php\PEAR') in C:\xampp\htdocs\web\old\it1\amd1\result3.php on line 2