There are 25 boys in Class 1, which is 1/4 less than girls. How many people are there in the whole class?
六一班男生25人，比女生少(1/4)，全班多少人？
<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">21 / (3/4)</gadget>
<output>28</output>

<gadget id="calculator">28 + 21</gadget>
<output>49</output>

<result>49</result>