Alright, let's work through 6790 times 2340 step by step
6790 × 2340 = 2340 × (6790)
+ 2340 × 0 what gives us 0
+ 2340 × 90 yielding 210600
+ 2340 × 700 what gives us 1638000
+ 2340 × 6000 producing 14040000

= 15888600
