In a ratio, the product of two outer terms is the smallest prime number, one inner term is 1.5, what should be the other inner term.
在一个比例里，两个外项的积是最小的质数，一个内项是1.5，另一个内项应是多少．
<gadget id="calculator">2 / 1.5</gadget>
<output>1.333333</output>

<result>1.333333</result>