No problem, we've got 4215 and 4734 to multiply
4215 × 4734 = 4734 × (4215)
+ 4734 × 5 what gives us 23670
+ 4734 × 10 what gives us 47340
+ 4734 × 200 that is equal 946800
+ 4734 × 4000 that is equal 18936000

= 19953810
