Alright, let's work through 7804 times 9120 step by step
7804 × 9120 = 9120 × (7804)
+ 9120 × 4 resulting in 36480
+ 9120 × 00 yielding 0
+ 9120 × 800 which equals 7296000
+ 9120 × 7000 producing 63840000

= 71172480
