Alright, let's work through 2391 times 1080 step by step
2391 × 1080 = 1080 × (2391)
+ 1080 × 1 what gives us 1080
+ 1080 × 90 giving us 97200
+ 1080 × 300 resulting in 324000
+ 1080 × 2000 that results in 2160000

= 2582280
