Alright, let's work through 7137071 times 53990603 step by step
7137071 × 53990603 = 53990603 × (7137071)
+ 53990603 × 1 that equals 53990603
+ 53990603 × 70 which equals 3779342210
+ 53990603 × 000 resulting in 0
+ 53990603 × 7000 which equals 377934221000
+ 53990603 × 30000 resulting in 1619718090000
+ 53990603 × 100000 that is equal 5399060300000
+ 53990603 × 7000000 giving us 377934221000000

= 385334766943813
