Alright, let's work through 4322 times 4155 step by step
4322 × 4155 = 4155 × (4322)
+ 4155 × 2 resulting in 8310
+ 4155 × 20 producing 83100
+ 4155 × 300 that results in 1246500
+ 4155 × 4000 resulting in 16620000

= 17957910
