No problem, we've got 1821 and 8666 to multiply
1821 × 8666 = 8666 × (1821)
+ 8666 × 1 resulting in 8666
+ 8666 × 20 which equals 173320
+ 8666 × 800 which equals 6932800
+ 8666 × 1000 what gives us 8666000

= 15780786
