No problem, we've got 1589 and 8381 to multiply
1589 × 8381 = 8381 × (1589)
+ 8381 × 9 giving us 75429
+ 8381 × 80 which equals 670480
+ 8381 × 500 what gives us 4190500
+ 8381 × 1000 that equals 8381000

= 13317409
