In the ratio, the two outer terms are reciprocals of each other, one inner term is 0.3, and the other inner term is what.
在比例中，两个外项互为倒数，一个内项是0.3，另一个内项是多少．
<gadget id="calculator">1 / 0.3</gadget>
<output>3.333333</output>

<result>3.333333</result>