Alright, let's work through 40013219 times 21183020 step by step
40013219 × 21183020 = 21183020 × (40013219)
+ 21183020 × 9 yielding 190647180
+ 21183020 × 10 that equals 211830200
+ 21183020 × 200 producing 4236604000
+ 21183020 × 3000 resulting in 63549060000
+ 21183020 × 10000 resulting in 211830200000
+ 21183020 × 000000 that results in 0
+ 21183020 × 0000000 what gives us 0
+ 21183020 × 40000000 which equals 847320800000000

= 847600818341380
