In the ratio, the two internal terms are 9 and 8 respectively, one of the external terms is 6, and the other external term is how much.
在比例中，两个内项分别9和8，其中一个外项是6，另一个外项是多少．
<gadget id="calculator">8 / 6</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">9 * (4/3)</gadget>
<output>12</output>

<result>12</result>