Alright, let's work through 4555 times 6643 step by step
4555 × 6643 = 6643 × (4555)
+ 6643 × 5 what gives us 33215
+ 6643 × 50 giving us 332150
+ 6643 × 500 that is equal 3321500
+ 6643 × 4000 producing 26572000

= 30258865
