The environmental protection team has to plant 500 saplings, and after 5 days there are still 180 saplings left unplanted. How many saplings does the environmental protection team plant on average every day?
环保小队要栽种500棵树苗，5天后还有180棵没栽，环保小队平均每天栽种多少棵树苗？
<gadget id="calculator">500 - 180</gadget>
<output>320</output>

<gadget id="calculator">320 / 5</gadget>
<output>64</output>

<result>64</result>