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Fatal error: Uncaught TypeError: cevir(): Argument #3 ($amount) must be of type float, null given, called in /home/hesaplacevir/htdocs/hesaplacevir.com/hesapla.php on line 33 and defined in /home/hesaplacevir/htdocs/hesaplacevir.com/fonksiyonlar.php:38 Stack trace: #0 /home/hesaplacevir/htdocs/hesaplacevir.com/hesapla.php(33): cevir() #1 {main} thrown in /home/hesaplacevir/htdocs/hesaplacevir.com/fonksiyonlar.php on line 38