There are 240 girls in the fifth grade, and boys are 10% less than girls. How many students are there in fifth grade?
五年级有女生240人，男生比女生少10%．五年级共有学生多少人？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">240 * (9/10)</gadget>
<output>216</output>

<gadget id="calculator">240 + 216</gadget>
<output>456</output>

<result>456</result>