Alright, let's work through 80988732 times 80216628 step by step
80988732 × 80216628 = 80216628 × (80988732)
+ 80216628 × 2 that equals 160433256
+ 80216628 × 30 resulting in 2406498840
+ 80216628 × 700 giving us 56151639600
+ 80216628 × 8000 what gives us 641733024000
+ 80216628 × 80000 giving us 6417330240000
+ 80216628 × 900000 that results in 72194965200000
+ 80216628 × 0000000 resulting in 0
+ 80216628 × 80000000 what gives us 6417330240000000

= 6496642987035696
