Alright, let's work through 6840 times 316 step by step
6840 × 316 = 316 × (6840)
+ 316 × 0 giving us 0
+ 316 × 40 yielding 12640
+ 316 × 800 producing 252800
+ 316 × 6000 resulting in 1896000

= 2161440
