(2/3) of the number of boys is the number of girls, what is the relational expression.
男生人数的(2/3)是女生人数，关系式是多少．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>