Alright, let's work through 80816172 times 52749732 step by step
80816172 × 52749732 = 52749732 × (80816172)
+ 52749732 × 2 that is equal 105499464
+ 52749732 × 70 that results in 3692481240
+ 52749732 × 100 that is equal 5274973200
+ 52749732 × 6000 that results in 316498392000
+ 52749732 × 10000 producing 527497320000
+ 52749732 × 800000 that equals 42199785600000
+ 52749732 × 0000000 which equals 0
+ 52749732 × 80000000 yielding 4219978560000000

= 4263031414265904
