Alright, let's work through 80736839 times 89475712 step by step
80736839 × 89475712 = 89475712 × (80736839)
+ 89475712 × 9 that equals 805281408
+ 89475712 × 30 that is equal 2684271360
+ 89475712 × 800 what gives us 71580569600
+ 89475712 × 6000 that is equal 536854272000
+ 89475712 × 30000 that equals 2684271360000
+ 89475712 × 700000 producing 62632998400000
+ 89475712 × 0000000 that equals 0
+ 89475712 × 80000000 giving us 7158056960000000

= 7223986154154368
