Alright, let's work through 5310 times 681 step by step
5310 × 681 = 681 × (5310)
+ 681 × 0 that is equal 0
+ 681 × 10 what gives us 6810
+ 681 × 300 yielding 204300
+ 681 × 5000 that results in 3405000

= 3616110
