No problem, we've got 4491 and 3820 to multiply
4491 × 3820 = 3820 × (4491)
+ 3820 × 1 that results in 3820
+ 3820 × 90 giving us 343800
+ 3820 × 400 that is equal 1528000
+ 3820 × 4000 that is equal 15280000

= 17155620
