The two outer terms of the known ratio are reciprocals of each other, one of the inner terms is 1.4, and the other inner term is what.
已知比例的两外项互为倒数，其中一个内项是1.4，另一个内项是多少．
<gadget id="calculator">1 / 1.4</gadget>
<output>0.714286</output>

<result>0.714286</result>