Alright, let's work through 8678 times 8136 step by step
8678 × 8136 = 8136 × (8678)
+ 8136 × 8 what gives us 65088
+ 8136 × 70 that equals 569520
+ 8136 × 600 yielding 4881600
+ 8136 × 8000 producing 65088000

= 70604208
