Alright, let's work through 89638479 times 75472448 step by step
89638479 × 75472448 = 75472448 × (89638479)
+ 75472448 × 9 what gives us 679252032
+ 75472448 × 70 producing 5283071360
+ 75472448 × 400 which equals 30188979200
+ 75472448 × 8000 that results in 603779584000
+ 75472448 × 30000 that results in 2264173440000
+ 75472448 × 600000 what gives us 45283468800000
+ 75472448 × 9000000 that is equal 679252032000000
+ 75472448 × 80000000 what gives us 6037795840000000

= 6765235445126592
