There are more boys than girls in class 64 (1/4), and 5 fewer girls than boys. How many girls are there in class 4?
六4班的男生比女生多(1/4)，女生比男生少5人，六4班女生有多少人？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<result>20</result>