Alright, let's work through 8489 times 7902 step by step
8489 × 7902 = 7902 × (8489)
+ 7902 × 9 that equals 71118
+ 7902 × 80 yielding 632160
+ 7902 × 400 giving us 3160800
+ 7902 × 8000 which equals 63216000

= 67080078
