Alright, let's work through 7440 times 873 step by step
7440 × 873 = 873 × (7440)
+ 873 × 0 which equals 0
+ 873 × 40 yielding 34920
+ 873 × 400 resulting in 349200
+ 873 × 7000 yielding 6111000

= 6495120
