title: Returning the nearest multiple value of a number
body: <p>I need a function by which I will be able to convert a number to a nearest value of a given multiple.</p>
  
  <p>Eg i want an array of number to be set to the neareast multiple of 16, so 2 = 0, 5 = 0, 11 = 16, 17 = 16, 30 = 32 etc</p>
  
  <p>thanks</p>