Alright, let's work through 84008810 times 81538480 step by step
84008810 × 81538480 = 81538480 × (84008810)
+ 81538480 × 0 resulting in 0
+ 81538480 × 10 resulting in 815384800
+ 81538480 × 800 that is equal 65230784000
+ 81538480 × 8000 giving us 652307840000
+ 81538480 × 00000 yielding 0
+ 81538480 × 000000 yielding 0
+ 81538480 × 4000000 that results in 326153920000000
+ 81538480 × 80000000 which equals 6523078400000000

= 6849950674008800
