In a ratio, the product of two inner terms is 2, one of the outer terms is (2/3), and what is the other outer term.
在一个比例中，两个内项的积是2，其中一个外项是(2/3)，另一个外项是多少．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

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

<result>3</result>