Alright, let's work through 77912746 times 49943299 step by step
77912746 × 49943299 = 49943299 × (77912746)
+ 49943299 × 6 yielding 299659794
+ 49943299 × 40 that results in 1997731960
+ 49943299 × 700 giving us 34960309300
+ 49943299 × 2000 that results in 99886598000
+ 49943299 × 10000 producing 499432990000
+ 49943299 × 900000 resulting in 44948969100000
+ 49943299 × 7000000 resulting in 349603093000000
+ 49943299 × 70000000 giving us 3496030930000000

= 3891219569389054
