Alright, let's work through 80889312 times 20814085 step by step
80889312 × 20814085 = 20814085 × (80889312)
+ 20814085 × 2 that results in 41628170
+ 20814085 × 10 which equals 208140850
+ 20814085 × 300 resulting in 6244225500
+ 20814085 × 9000 yielding 187326765000
+ 20814085 × 80000 that is equal 1665126800000
+ 20814085 × 800000 that results in 16651268000000
+ 20814085 × 0000000 yielding 0
+ 20814085 × 80000000 that results in 1665126800000000

= 1683637015559520
