The sixth grade students of Guangming Primary School planted 240 trees, which is 80% of the fifth grade. How many trees were planted in the fifth and sixth grades?
光明小学六年级学生植树240棵，是五年级的80%，五、六年级一共植树多少棵？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">240 / (4/5)</gadget>
<output>300</output>

<gadget id="calculator">240 + 300</gadget>
<output>540</output>

<result>540</result>