Alright, let's work through 8624 times 8642 step by step
8624 × 8642 = 8642 × (8624)
+ 8642 × 4 resulting in 34568
+ 8642 × 20 that is equal 172840
+ 8642 × 600 yielding 5185200
+ 8642 × 8000 yielding 69136000

= 74528608
