Calculate the area of an image limited by ruler
x=y ; x=2y ; x+y=a ; x+3y=a

How many five -digit positive integers have the property that the product of their digits is 2014?

We have number from 1 to 2014. If we underline the number that divide by 3 and 4, how many pattern of two underlines that next to each other as example 3 , 4 and 8 , 9?