Alright, let's work through 84368141 times 9971989 step by step
84368141 × 9971989 = 9971989 × (84368141)
+ 9971989 × 1 giving us 9971989
+ 9971989 × 40 that results in 398879560
+ 9971989 × 100 giving us 997198900
+ 9971989 × 8000 that is equal 79775912000
+ 9971989 × 60000 that results in 598319340000
+ 9971989 × 300000 that results in 2991596700000
+ 9971989 × 4000000 that results in 39887956000000
+ 9971989 × 80000000 giving us 797759120000000

= 841318174002449
