9 * 10 * 1 * 18 * 18?

That equals 29,160 is the correct answer

Take it step by step, or if you'd rather go the easy way, hit the calculator. Whatever the case, you'd want to do it step by step:

10 * 9 = 90 : You multiply 90 and the next number, and continue.

90 * 1 = 90 : Still a 90. Multiply 90 and 18, which is the next number.

90 * 18 = 1,620 : Multiply this with 18 as well, because that's the last number.

Your final answer is : 29, 160.