No problem, we've got 4223 and 9521 to multiply
4223 × 9521 = 9521 × (4223)
+ 9521 × 3 that equals 28563
+ 9521 × 20 that is equal 190420
+ 9521 × 200 yielding 1904200
+ 9521 × 4000 that equals 38084000

= 40207183
