Alright, let's work through 7840 times 1132 step by step
7840 × 1132 = 1132 × (7840)
+ 1132 × 0 that is equal 0
+ 1132 × 40 that is equal 45280
+ 1132 × 800 which equals 905600
+ 1132 × 7000 resulting in 7924000

= 8874880
