There are 63 students in Class 51. It is known that boys account for 4/5 of girls. How many girls are there in this class?
五1班有学生63人，已知男生占女生的(4/5)，这个班有女生多少人？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 + (4/5)</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">63 / (9/5)</gadget>
<output>35</output>

<result>35</result>