To divide one by two means to take one and split it in half. For example, if you have 1 pie and you / by 2. You took one whole pie and made two, half slices.
Your result is; from one pie, you have two pieces, if you divide by five, you get five pieces. So on & so so forth. But be careful, because each time you divide more and more, the slices get smaller & smaller. Hope this helps.