Alright, let's work through 40142907 times 91177072 step by step
40142907 × 91177072 = 91177072 × (40142907)
+ 91177072 × 7 yielding 638239504
+ 91177072 × 00 producing 0
+ 91177072 × 900 that results in 82059364800
+ 91177072 × 2000 producing 182354144000
+ 91177072 × 40000 giving us 3647082880000
+ 91177072 × 100000 producing 9117707200000
+ 91177072 × 0000000 producing 0
+ 91177072 × 40000000 that is equal 3647082880000000

= 3660112721828304
