No problem, we've got 6414 and 9960 to multiply
6414 × 9960 = 9960 × (6414)
+ 9960 × 4 yielding 39840
+ 9960 × 10 what gives us 99600
+ 9960 × 400 giving us 3984000
+ 9960 × 6000 producing 59760000

= 63883440
