Sixth grade teachers and students donated 300 books to Hope Primary School, which is 1/4 more than the fifth grade. How many books do fifth grade teachers and students donate?
六年级师生向希望小学捐书300本，比五年级多捐(1/4)．五年级师生捐书多少本？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

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

<result>240</result>