Alright, let's work through 9815 times 5643 step by step
9815 × 5643 = 5643 × (9815)
+ 5643 × 5 that is equal 28215
+ 5643 × 10 resulting in 56430
+ 5643 × 800 that is equal 4514400
+ 5643 × 9000 that is equal 50787000

= 55386045
