Alright, let's work through 8478 times 9156 step by step
8478 × 9156 = 9156 × (8478)
+ 9156 × 8 that equals 73248
+ 9156 × 70 that equals 640920
+ 9156 × 400 that is equal 3662400
+ 9156 × 8000 what gives us 73248000

= 77624568
