Alright, let's work through 6210 times 542 step by step
6210 × 542 = 542 × (6210)
+ 542 × 0 producing 0
+ 542 × 10 that is equal 5420
+ 542 × 200 that equals 108400
+ 542 × 6000 yielding 3252000

= 3365820
