Alright, let's work through 2140 times 855 step by step
2140 × 855 = 855 × (2140)
+ 855 × 0 what gives us 0
+ 855 × 40 giving us 34200
+ 855 × 100 resulting in 85500
+ 855 × 2000 what gives us 1710000

= 1829700
