No problem, we've got 4163 and 1616 to multiply
4163 × 1616 = 1616 × (4163)
+ 1616 × 3 what gives us 4848
+ 1616 × 60 that is equal 96960
+ 1616 × 100 that equals 161600
+ 1616 × 4000 that equals 6464000

= 6727408
