In a ratio, the product of two inner terms is 1, one outer term is (5/6), and the other outer term is known.
在一个比例中，两个内项的积是1，已知一个外项是(5/6)，另一个外项是多少．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 / (5/6)</gadget>
<output>6/5 = around 1.2</output>

<result>6/5 = around 1.2</result>