Alright, let's work through 6820 times 855 step by step
6820 × 855 = 855 × (6820)
+ 855 × 0 that is equal 0
+ 855 × 20 what gives us 17100
+ 855 × 800 giving us 684000
+ 855 × 6000 that results in 5130000

= 5831100
