Alright, let's work through 80739728 times 39948817 step by step
80739728 × 39948817 = 39948817 × (80739728)
+ 39948817 × 8 that is equal 319590536
+ 39948817 × 20 producing 798976340
+ 39948817 × 700 giving us 27964171900
+ 39948817 × 9000 resulting in 359539353000
+ 39948817 × 30000 resulting in 1198464510000
+ 39948817 × 700000 giving us 27964171900000
+ 39948817 × 0000000 that results in 0
+ 39948817 × 80000000 that is equal 3195905360000000

= 3225456618501776
