Alright, let's work through 28201880 times 71634999 step by step
28201880 × 71634999 = 71634999 × (28201880)
+ 71634999 × 0 which equals 0
+ 71634999 × 80 that equals 5730799920
+ 71634999 × 800 resulting in 57307999200
+ 71634999 × 1000 resulting in 71634999000
+ 71634999 × 00000 that is equal 0
+ 71634999 × 200000 yielding 14326999800000
+ 71634999 × 8000000 what gives us 573079992000000
+ 71634999 × 20000000 which equals 1432699980000000

= 2020241645598120
