Let's calculate 10138518 x 40289723
10138518 × 40289723 = 40289723 × (10138518)
+ 40289723 × 8 that equals 322317784
+ 40289723 × 10 that results in 402897230
+ 40289723 × 500 yielding 20144861500
+ 40289723 × 8000 that equals 322317784000
+ 40289723 × 30000 resulting in 1208691690000
+ 40289723 × 100000 yielding 4028972300000
+ 40289723 × 0000000 resulting in 0
+ 40289723 × 10000000 which equals 402897230000000

= 408478081850514
