Alright, let's work through 43442600 times 90389136 step by step
43442600 × 90389136 = 90389136 × (43442600)
+ 90389136 × 0 which equals 0
+ 90389136 × 00 that results in 0
+ 90389136 × 600 which equals 54233481600
+ 90389136 × 2000 that is equal 180778272000
+ 90389136 × 40000 that is equal 3615565440000
+ 90389136 × 400000 that is equal 36155654400000
+ 90389136 × 3000000 which equals 271167408000000
+ 90389136 × 40000000 yielding 3615565440000000

= 3926739079593600
