In a ratio, the two outer terms are reciprocals of each other, if one inner term is 2.25, what is the other inner term.
在一个比例中，两个外项互为倒数，如果一个内项是2.25，则另一个内项是多少．
<gadget id="calculator">1 / 2.25</gadget>
<output>0.444444</output>

<result>0.444444</result>