Alright, let's work through 40477089 times 9920753 step by step
40477089 × 9920753 = 9920753 × (40477089)
+ 9920753 × 9 giving us 89286777
+ 9920753 × 80 resulting in 793660240
+ 9920753 × 000 giving us 0
+ 9920753 × 7000 which equals 69445271000
+ 9920753 × 70000 that equals 694452710000
+ 9920753 × 400000 yielding 3968301200000
+ 9920753 × 0000000 giving us 0
+ 9920753 × 40000000 giving us 396830120000000

= 401563202128017
