The number of boys in class six (second) is 2/3 of the number of girls. There are 45 students in the whole class. How many girls are there?
六(二)班男生人数是女生人数的(2/3)，全班有45人，女生有多少人？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 + (2/3)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">45 / (5/3)</gadget>
<output>27</output>

<result>27</result>