Harold had 100 marbles. He kept 20 marbles and shared the rest evenly among his 5 friends. How many marbles did each friend get?
Harold shared 100 - 20 = 
<gadget id="calculator">100-20</gadget>
<output>80</output>
80 marbles with his friends.
Therefore, his 5 friends got 80/5 = 
<gadget id="calculator">80/5</gadget>
<output>16</output>
16 marbles each.

<result>16</result>