Alright, let's work through 6340 times 6213 step by step
6340 × 6213 = 6213 × (6340)
+ 6213 × 0 yielding 0
+ 6213 × 40 yielding 248520
+ 6213 × 300 what gives us 1863900
+ 6213 × 6000 resulting in 37278000

= 39390420
