BODMAS
Brackets first (1+2)=3
Division 6/2= 3
Multiplication 3(3) = 9
Your welcome.
English
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Or you know, just type it in to a calculator and it equals 1.
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What kind of calculator you using lol? An abacus? Use anything: calculator, excel, matlab, hell even google exactly as written in OP [spoiler]9[/spoiler]