As per every single calculator I own, as per Google, as per PEMDAS etc. etc. the answer ought to be 5.
At least your answer revealed that you and the computer round 10/6=1.6667 to 10/6=1, which certainly isn't kosher. Perhaps you might have been better to have explained WHY that's ok in your eyes.
"Thread sould be closed." A bit unecessarily trite, don't you think? Asking for help is what forums are for. If I'm in the wrong place, you could say so. But your dismissive response is inappropriate by anyone's measure. Absolutely no excuse for abusing newcomers.