Alright, let's work through 6939 times 400 step by step
6939 × 400 = 400 × (6939)
+ 400 × 9 yielding 3600
+ 400 × 30 resulting in 12000
+ 400 × 900 resulting in 360000
+ 400 × 6000 that is equal 2400000

= 2775600
