Alright, let's work through 2121 times 7164 step by step
2121 × 7164 = 7164 × (2121)
+ 7164 × 1 resulting in 7164
+ 7164 × 20 resulting in 143280
+ 7164 × 100 which equals 716400
+ 7164 × 2000 which equals 14328000

= 15194844
