In a ratio, the two outer terms are reciprocals of each other, one of the inner terms is (7/3), and the other outer term is
在一个比例中，两个外项互为倒数，其中一个内项是(7/3)，另一个外项是多少
<gadget id="calculator">7 / 3</gadget>
<output>7/3 = around 2.333333</output>

<gadget id="calculator">1 / (7/3)</gadget>
<output>3/7 = around 0.428571</output>

<result>3/7 = around 0.428571</result>