Yume Being Like Jomblo #2

1. 840

2. 479.001.600

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1. 6! + 5! = …

= ((6 × 5) × (4 × 3) × (2 × 1)) + ((5 × 4) × (3 × 2) × 1))

= ((30 × 12) × 2)) + ((20 × 6) × 1))

= (360 × 2) + (120 × 1)

= 720 + 120

= 840

2. 12! = …

= 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1

= 479.001.600

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