Alright, let's work through 2660 times 6810 step by step
2660 × 6810 = 6810 × (2660)
+ 6810 × 0 yielding 0
+ 6810 × 60 what gives us 408600
+ 6810 × 600 that is equal 4086000
+ 6810 × 2000 that equals 13620000

= 18114600
