Alright, let's work through 4520 times 4031 step by step
4520 × 4031 = 4031 × (4520)
+ 4031 × 0 giving us 0
+ 4031 × 20 resulting in 80620
+ 4031 × 500 giving us 2015500
+ 4031 × 4000 that is equal 16124000

= 18220120
