Alright, let's work through 2740 times 312 step by step
2740 × 312 = 312 × (2740)
+ 312 × 0 that results in 0
+ 312 × 40 that is equal 12480
+ 312 × 700 what gives us 218400
+ 312 × 2000 resulting in 624000

= 854880
