There are 30 people in the school art interest group, which is 1/4 more than the dance group. How many people are there in the dance group?
学校美术兴趣小组有30人，比舞蹈小组多(1/4)，舞蹈小组有多少人？
<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">30 / (5/4)</gadget>
<output>24</output>

<result>24</result>