No problem, we've got 1444 and 1680 to multiply
1444 × 1680 = 1680 × (1444)
+ 1680 × 4 producing 6720
+ 1680 × 40 that is equal 67200
+ 1680 × 400 producing 672000
+ 1680 × 1000 what gives us 1680000

= 2425920
