No problem, we've got 2163 and 3894 to multiply
2163 × 3894 = 3894 × (2163)
+ 3894 × 3 that equals 11682
+ 3894 × 60 yielding 233640
+ 3894 × 100 that results in 389400
+ 3894 × 2000 that equals 7788000

= 8422722
