The number of students in the fifth grade of Yuming Primary School accounts for 20% of the whole school, and the sixth grade accounts for 25% of the whole school. The number of students in the sixth grade is 50 more than that of the fifth grade. How many students are there in the school?
育明小学五年级学生人数占全校的20%，六年级占全校的25%，六年级比五年级多50人，全校多少人？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/4) - (1/5)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">50 / (1/20)</gadget>
<output>1_000</output>

<result>1_000</result>