No problem, we've got 6420 and 5656 to multiply
6420 × 5656 = 5656 × (6420)
+ 5656 × 0 what gives us 0
+ 5656 × 20 giving us 113120
+ 5656 × 400 producing 2262400
+ 5656 × 6000 that equals 33936000

= 36311520
