In a ratio, the product of two outer terms is 1, and one inner term is (2/3), what is the other inner term.
在一个比例中，两个外项的积是1，其中一个内项是(2/3)，则另一个内项是多少．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / (2/3)</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>