No problem, we've got 1649 and 2121 to multiply
1649 × 2121 = 2121 × (1649)
+ 2121 × 9 what gives us 19089
+ 2121 × 40 resulting in 84840
+ 2121 × 600 what gives us 1272600
+ 2121 × 1000 that is equal 2121000

= 3497529
