The campus road is 50 meters long, and a tree is planted every 5 meters from one end to the other end of the road. Put 2 potted flowers between every two trees, how many potted flowers are placed in total.
校园的甬路长50米，在甬路的一侧从一端到另一端每隔5米种一棵树．在每两棵树之间摆2盆花，一共摆了多少盆花．
<gadget id="calculator">50 / 5</gadget>
<output>10</output>

<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<result>20</result>