No problem, we've got 4121 and 5681 to multiply
4121 × 5681 = 5681 × (4121)
+ 5681 × 1 what gives us 5681
+ 5681 × 20 producing 113620
+ 5681 × 100 producing 568100
+ 5681 × 4000 giving us 22724000

= 23411401
