Alright, let's work through 40103391 times 98013051 step by step
40103391 × 98013051 = 98013051 × (40103391)
+ 98013051 × 1 resulting in 98013051
+ 98013051 × 90 resulting in 8821174590
+ 98013051 × 300 producing 29403915300
+ 98013051 × 3000 that equals 294039153000
+ 98013051 × 00000 which equals 0
+ 98013051 × 100000 which equals 9801305100000
+ 98013051 × 0000000 that is equal 0
+ 98013051 × 40000000 what gives us 3920522040000000

= 3930655707355941
