In the ratio, the two internal terms are reciprocals of each other, one of the external terms is 23, and the other external term is how much.
在比例中，两个内项互为倒数，其中一个外项是23，另一个外项是多少．
<gadget id="calculator">1 / 23</gadget>
<output>1/23 = around 0.043478</output>

<result>1/23 = around 0.043478</result>