Alright, let's work through 73942897 times 63604489 step by step
73942897 × 63604489 = 63604489 × (73942897)
+ 63604489 × 7 that results in 445231423
+ 63604489 × 90 yielding 5724404010
+ 63604489 × 800 what gives us 50883591200
+ 63604489 × 2000 giving us 127208978000
+ 63604489 × 40000 yielding 2544179560000
+ 63604489 × 900000 resulting in 57244040100000
+ 63604489 × 3000000 yielding 190813467000000
+ 63604489 × 70000000 that results in 4452314230000000

= 4703100178864633
