In a ratio, the two outer terms are exactly reciprocals of each other, one of the inner terms is 3, and what is the other inner term? Please list a ratio according to the known conditions and explain the reason.
在一个比例中，两个外项正好互为倒数，其中一个内项是3，另一个内项是多少？请你根据已知条件列出一个比例，说明理由．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>