No problem, we've got 4156 and 4520 to multiply
4156 × 4520 = 4520 × (4156)
+ 4520 × 6 that is equal 27120
+ 4520 × 50 producing 226000
+ 4520 × 100 what gives us 452000
+ 4520 × 4000 producing 18080000

= 18785120
