Alright, let's work through 80388518 times 73442979 step by step
80388518 × 73442979 = 73442979 × (80388518)
+ 73442979 × 8 that equals 587543832
+ 73442979 × 10 that results in 734429790
+ 73442979 × 500 that results in 36721489500
+ 73442979 × 8000 what gives us 587543832000
+ 73442979 × 80000 yielding 5875438320000
+ 73442979 × 300000 resulting in 22032893700000
+ 73442979 × 0000000 what gives us 0
+ 73442979 × 80000000 giving us 5875438320000000

= 5903972239315122
