In a ratio, the product of two outer terms is (5/2), and one inner term is known to be (2/5), and what is the other inner term.
一个比例里，两个外项积是(5/2)，已知一个内项是(2/5)，另一个内项是多少．
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(5/2) * (5/2)</gadget>
<output>25/4 = around 6.25</output>

<result>25/4 = around 6.25</result>