There are n boys in Class 1, and the number of girls is (2/3) less than the number of boys. How many girls are there?
六1班有男生n人，女生人数是男生人数的(2/3)少a人，女生有多少人．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

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