Evaluate 9!

Problem

9!

Solution

1. Identify the factorial operation, which requires multiplying the given positive integer by every positive integer less than itself down to 1.

2. Expand the expression into its constituent factors.

9!=9×8×7×6×5×4×3×2×1

3. Multiply the numbers sequentially or in groups to find the product.

9×8=72

72×7=504

504×6=3024

3024×5=15120

15120×4=60480

60480×3=181440

181440×2=362880

362880×1=362880

Final Answer

9!=362880

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