title: Why is division more expensive than multiplication?
body: <p>I am not really trying to optimize anything, but I remember hearing this from programmers all the time, that I took it as a truth. After all they are supposed to know this stuff.</p>
  
  <p>But I wonder why is division actually slower than multiplication? Isn't division just a glorified subtraction, and multiplication is a glorified addition? So mathematically I don't see why going one way or the other has computationally very different costs.</p>
  
  <p>Can anyone please clarify the reason/cause of this so I know, instead of what I heard from other programmer's that I asked before which is: "because".</p>