No problem, we've got 4165 and 5188 to multiply
4165 × 5188 = 5188 × (4165)
+ 5188 × 5 that is equal 25940
+ 5188 × 60 what gives us 311280
+ 5188 × 100 yielding 518800
+ 5188 × 4000 that is equal 20752000

= 21608020
