Alright, let's work through 8437 times 8540 step by step
8437 × 8540 = 8540 × (8437)
+ 8540 × 7 giving us 59780
+ 8540 × 30 that is equal 256200
+ 8540 × 400 resulting in 3416000
+ 8540 × 8000 what gives us 68320000

= 72051980
