No problem, we've got 1646 and 7854 to multiply
1646 × 7854 = 7854 × (1646)
+ 7854 × 6 which equals 47124
+ 7854 × 40 which equals 314160
+ 7854 × 600 which equals 4712400
+ 7854 × 1000 resulting in 7854000

= 12927684
