There are 540 boys, 60 fewer than the number of girls (2/3), how many girls are there?
有男生540人，比女生人数的(2/3)少60人，女生多少人？
<gadget id="calculator">540 + 60</gadget>
<output>600</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">600 / (2/3)</gadget>
<output>900</output>

<result>900</result>