Alright, let's work through 7807 times 1764 step by step
7807 × 1764 = 1764 × (7807)
+ 1764 × 7 that is equal 12348
+ 1764 × 00 that results in 0
+ 1764 × 800 yielding 1411200
+ 1764 × 7000 that results in 12348000

= 13771548
