A rope is 20 meters long. After cutting 4 meters, make a skipping rope every 2 meters. How many skipping ropes can be made for the rest?
一条绳子长20米，剪下4米后，每2米做一根跳绳，剩下的可以做几根跳绳？
<gadget id="calculator">20 - 4</gadget>
<output>16</output>

<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<result>8</result>