Alright, let's work through 83513394 times 45200777 step by step
83513394 × 45200777 = 45200777 × (83513394)
+ 45200777 × 4 what gives us 180803108
+ 45200777 × 90 that equals 4068069930
+ 45200777 × 300 that results in 13560233100
+ 45200777 × 3000 that results in 135602331000
+ 45200777 × 10000 producing 452007770000
+ 45200777 × 500000 what gives us 22600388500000
+ 45200777 × 3000000 that is equal 135602331000000
+ 45200777 × 80000000 producing 3616062160000000

= 3774870298707138
