No problem, we've got 1661 and 1672 to multiply
1661 × 1672 = 1672 × (1661)
+ 1672 × 1 which equals 1672
+ 1672 × 60 which equals 100320
+ 1672 × 600 yielding 1003200
+ 1672 × 1000 which equals 1672000

= 2777192
