Alright, let's work through 84699871 times 49998786 step by step
84699871 × 49998786 = 49998786 × (84699871)
+ 49998786 × 1 giving us 49998786
+ 49998786 × 70 resulting in 3499915020
+ 49998786 × 800 what gives us 39999028800
+ 49998786 × 9000 what gives us 449989074000
+ 49998786 × 90000 producing 4499890740000
+ 49998786 × 600000 producing 29999271600000
+ 49998786 × 4000000 giving us 199995144000000
+ 49998786 × 80000000 resulting in 3999902880000000

= 4234890724356606
