Alright, let's work through 4542 times 4442 step by step
4542 × 4442 = 4442 × (4542)
+ 4442 × 2 giving us 8884
+ 4442 × 40 that is equal 177680
+ 4442 × 500 which equals 2221000
+ 4442 × 4000 yielding 17768000

= 20175564
