Alright, let's work through 8531 times 6900 step by step
8531 × 6900 = 6900 × (8531)
+ 6900 × 1 that is equal 6900
+ 6900 × 30 resulting in 207000
+ 6900 × 500 yielding 3450000
+ 6900 × 8000 yielding 55200000

= 58863900
