Create a function with two arguments that will return an array of the first n multiples of x.
Assume both the given number and the number of times to count will be positive numbers greater
than 0.
Return the results as an array or list ( depending on language ).
countBy(1,10) // should return {1,2,3,4,5,6,7,8,9,10}
countBy(2,5) // should return {2,4,6,8,10}