Alright, let's work through 7804 times 2542 step by step
7804 × 2542 = 2542 × (7804)
+ 2542 × 4 resulting in 10168
+ 2542 × 00 resulting in 0
+ 2542 × 800 which equals 2033600
+ 2542 × 7000 which equals 17794000

= 19837768
