Alright, let's work through 81002784 times 40787741 step by step
81002784 × 40787741 = 40787741 × (81002784)
+ 40787741 × 4 yielding 163150964
+ 40787741 × 80 which equals 3263019280
+ 40787741 × 700 which equals 28551418700
+ 40787741 × 2000 yielding 81575482000
+ 40787741 × 00000 giving us 0
+ 40787741 × 000000 yielding 0
+ 40787741 × 1000000 what gives us 40787741000000
+ 40787741 × 80000000 that is equal 3263019280000000

= 3303920574070944
