Alright, let's work through 40028301 times 81602836 step by step
40028301 × 81602836 = 81602836 × (40028301)
+ 81602836 × 1 yielding 81602836
+ 81602836 × 00 yielding 0
+ 81602836 × 300 that equals 24480850800
+ 81602836 × 8000 giving us 652822688000
+ 81602836 × 20000 what gives us 1632056720000
+ 81602836 × 000000 that equals 0
+ 81602836 × 0000000 giving us 0
+ 81602836 × 40000000 yielding 3264113440000000

= 3266422881861636
