Alright, let's work through 1816 times 7764 step by step
1816 × 7764 = 7764 × (1816)
+ 7764 × 6 that is equal 46584
+ 7764 × 10 that is equal 77640
+ 7764 × 800 resulting in 6211200
+ 7764 × 1000 which equals 7764000

= 14099424
