No problem, we've got 8489 and 1389 to multiply
8489 × 1389 = 1389 × (8489)
+ 1389 × 9 giving us 12501
+ 1389 × 80 what gives us 111120
+ 1389 × 400 giving us 555600
+ 1389 × 8000 giving us 11112000

= 11791221
