Alright, let's work through 83721200 times 45913281 step by step
83721200 × 45913281 = 45913281 × (83721200)
+ 45913281 × 0 what gives us 0
+ 45913281 × 00 that is equal 0
+ 45913281 × 200 which equals 9182656200
+ 45913281 × 1000 yielding 45913281000
+ 45913281 × 20000 that results in 918265620000
+ 45913281 × 700000 which equals 32139296700000
+ 45913281 × 3000000 which equals 137739843000000
+ 45913281 × 80000000 yielding 3673062480000000

= 3843914981257200
