There are 15 boys in Class 2, which is 1/4 less than girls. How many people are there in the whole class?
六2班有男生15人，比女生少(1/4)，全班有多少人？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">15 / (3/4)</gadget>
<output>20</output>

<gadget id="calculator">20 + 15</gadget>
<output>35</output>

<result>35</result>