Alright, let's work through 40040125 times 72843409 step by step
40040125 × 72843409 = 72843409 × (40040125)
+ 72843409 × 5 that is equal 364217045
+ 72843409 × 20 yielding 1456868180
+ 72843409 × 100 what gives us 7284340900
+ 72843409 × 0000 that equals 0
+ 72843409 × 40000 resulting in 2913736360000
+ 72843409 × 000000 what gives us 0
+ 72843409 × 0000000 producing 0
+ 72843409 × 40000000 resulting in 2913736360000000

= 2916659201786125
