Alright, let's work through 8555 times 8572 step by step
8555 × 8572 = 8572 × (8555)
+ 8572 × 5 which equals 42860
+ 8572 × 50 which equals 428600
+ 8572 × 500 that equals 4286000
+ 8572 × 8000 that is equal 68576000

= 73333460
