Alright, let's work through 1089 times 7910 step by step
1089 × 7910 = 7910 × (1089)
+ 7910 × 9 resulting in 71190
+ 7910 × 80 that is equal 632800
+ 7910 × 000 yielding 0
+ 7910 × 1000 that results in 7910000

= 8613990
