Alright, let's work through 7809 times 1428 step by step
7809 × 1428 = 1428 × (7809)
+ 1428 × 9 that equals 12852
+ 1428 × 00 producing 0
+ 1428 × 800 giving us 1142400
+ 1428 × 7000 giving us 9996000

= 11151252
