Alright, let's work through 40291010 times 99882986 step by step
40291010 × 99882986 = 99882986 × (40291010)
+ 99882986 × 0 giving us 0
+ 99882986 × 10 producing 998829860
+ 99882986 × 000 yielding 0
+ 99882986 × 1000 which equals 99882986000
+ 99882986 × 90000 resulting in 8989468740000
+ 99882986 × 200000 producing 19976597200000
+ 99882986 × 0000000 yielding 0
+ 99882986 × 40000000 that is equal 3995319440000000

= 4024386387755860
