You should use your calculator for such simple sums. It is far quicker and involves fewer key depressions than posting the question on WA. But since you seem unable to carry out even this simple task, the answer is 48.6
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n + 18 = 27 subtract 18 to 18 and 27 18-27=9 n = 9
it equals 18 times 18. 18 times 18 equals 324. 324 is your answer.
No, 27 divided by 18 equals 1 with a remainder of 9.
-9
642 times 27 equals 17,334