No problem, we've got 1616 and 3928 to multiply
1616 × 3928 = 3928 × (1616)
+ 3928 × 6 that results in 23568
+ 3928 × 10 what gives us 39280
+ 3928 × 600 what gives us 2356800
+ 3928 × 1000 yielding 3928000

= 6347648
