Alright, let's work through 8451 times 7910 step by step
8451 × 7910 = 7910 × (8451)
+ 7910 × 1 resulting in 7910
+ 7910 × 50 what gives us 395500
+ 7910 × 400 yielding 3164000
+ 7910 × 8000 producing 63280000

= 66847410
