Alright, let's work through 73874480 times 89128947 step by step
73874480 × 89128947 = 89128947 × (73874480)
+ 89128947 × 0 which equals 0
+ 89128947 × 80 giving us 7130315760
+ 89128947 × 400 yielding 35651578800
+ 89128947 × 4000 giving us 356515788000
+ 89128947 × 70000 that is equal 6239026290000
+ 89128947 × 800000 giving us 71303157600000
+ 89128947 × 3000000 yielding 267386841000000
+ 89128947 × 70000000 that is equal 6239026290000000

= 6584354612572560
