Alright, let's work through 8478 times 7805 step by step
8478 × 7805 = 7805 × (8478)
+ 7805 × 8 yielding 62440
+ 7805 × 70 resulting in 546350
+ 7805 × 400 producing 3122000
+ 7805 × 8000 which equals 62440000

= 66170790
