There are 180 students in the sixth grade, of which boys account for (3/5), how many girls are there in the sixth grade?
六年级共有180名学生，其中男生占(3/5)，六年级有女生多少人？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">180 * (2/5)</gadget>
<output>72</output>

<result>72</result>