A (4/5) meter steel column weighs (1/25) tons, what is the length of the same steel column (4/5) tons?
(4/5)米钢柱重(1/25)吨，同样的钢柱(4/5)吨长多少米．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 25</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">(4/5) / (1/25)</gadget>
<output>20</output>

<gadget id="calculator">20 * (4/5)</gadget>
<output>16</output>

<result>16</result>