In the ratio, the product of the two outer terms is 18, one of the inner terms is 0.5, and what is the other inner term.
在比例里，两个外项的积是18，其中一个内项是0.5，另一个内项是多少．
<gadget id="calculator">18 / 0.5</gadget>
<output>36</output>

<result>36</result>