Alright, let's work through 4545 times 4121 step by step
4545 × 4121 = 4121 × (4545)
+ 4121 × 5 that is equal 20605
+ 4121 × 40 which equals 164840
+ 4121 × 500 that results in 2060500
+ 4121 × 4000 which equals 16484000

= 18729945
