Alright, let's work through 7860 times 8456 step by step
7860 × 8456 = 8456 × (7860)
+ 8456 × 0 producing 0
+ 8456 × 60 that results in 507360
+ 8456 × 800 what gives us 6764800
+ 8456 × 7000 what gives us 59192000

= 66464160
