Alright, let's work through 46313459 times 81010794 step by step
46313459 × 81010794 = 81010794 × (46313459)
+ 81010794 × 9 what gives us 729097146
+ 81010794 × 50 yielding 4050539700
+ 81010794 × 400 producing 32404317600
+ 81010794 × 3000 what gives us 243032382000
+ 81010794 × 10000 giving us 810107940000
+ 81010794 × 300000 resulting in 24303238200000
+ 81010794 × 6000000 giving us 486064764000000
+ 81010794 × 40000000 what gives us 3240431760000000

= 3751890086476446
