No problem, we've got 4091 and 4964 to multiply
4091 × 4964 = 4964 × (4091)
+ 4964 × 1 that equals 4964
+ 4964 × 90 resulting in 446760
+ 4964 × 000 yielding 0
+ 4964 × 4000 that is equal 19856000

= 20307724
