Alright, let's work through 4855 times 4993 step by step
4855 × 4993 = 4993 × (4855)
+ 4993 × 5 that equals 24965
+ 4993 × 50 that is equal 249650
+ 4993 × 800 yielding 3994400
+ 4993 × 4000 what gives us 19972000

= 24241015
