Alright, let's work through 41181997 times 63628479 step by step
41181997 × 63628479 = 63628479 × (41181997)
+ 63628479 × 7 yielding 445399353
+ 63628479 × 90 yielding 5726563110
+ 63628479 × 900 that is equal 57265631100
+ 63628479 × 1000 resulting in 63628479000
+ 63628479 × 80000 giving us 5090278320000
+ 63628479 × 100000 resulting in 6362847900000
+ 63628479 × 1000000 that results in 63628479000000
+ 63628479 × 40000000 yielding 2545139160000000

= 2620347831292563
