A ratio, the product of two outer terms is the smallest prime number, and one of the inner terms is 3, then what is the other inner term.
一个比例，两个外项的乘积是最小的质数，其中一个内项是3，则另一个内项是多少．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>