Alright, let's work through 3402 times 6810 step by step
3402 × 6810 = 6810 × (3402)
+ 6810 × 2 giving us 13620
+ 6810 × 00 what gives us 0
+ 6810 × 400 yielding 2724000
+ 6810 × 3000 what gives us 20430000

= 23167620
