No problem, we've got 1647 and 1684 to multiply
1647 × 1684 = 1684 × (1647)
+ 1684 × 7 resulting in 11788
+ 1684 × 40 that is equal 67360
+ 1684 × 600 producing 1010400
+ 1684 × 1000 that is equal 1684000

= 2773548
