There are 36 boys in Class 1 of June, which is the number of the whole class (4/7). How many girls are there?
六1班有男生36人，是全班人数的(4/7)．女生有多少人？
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">36 / (4/7)</gadget>
<output>63</output>

<gadget id="calculator">63 - 36</gadget>
<output>27</output>

<result>27</result>