No problem, we've got 4155 and 5390 to multiply
4155 × 5390 = 5390 × (4155)
+ 5390 × 5 giving us 26950
+ 5390 × 50 that is equal 269500
+ 5390 × 100 that equals 539000
+ 5390 × 4000 producing 21560000

= 22395450
