Alright, let's work through 6816 times 2013 step by step
6816 × 2013 = 2013 × (6816)
+ 2013 × 6 which equals 12078
+ 2013 × 10 what gives us 20130
+ 2013 × 800 yielding 1610400
+ 2013 × 6000 resulting in 12078000

= 13720608
