In a ratio, the product of two inner terms is (2/5), one outer term is 6, and the other outer term is what.
在一个比例中，两个内项的积是(2/5)，一个外项是6，另一个外项是多少．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) / 6</gadget>
<output>1/15 = around 0.066667</output>

<result>1/15 = around 0.066667</result>