Alright, let's work through 68040354 times 68872893 step by step
68040354 × 68872893 = 68872893 × (68040354)
+ 68872893 × 4 yielding 275491572
+ 68872893 × 50 resulting in 3443644650
+ 68872893 × 300 producing 20661867900
+ 68872893 × 0000 what gives us 0
+ 68872893 × 40000 what gives us 2754915720000
+ 68872893 × 000000 yielding 0
+ 68872893 × 8000000 that is equal 550983144000000
+ 68872893 × 60000000 yielding 4132373580000000

= 4686136020724122
