A precision part drawn on a drawing with a scale of 20:1 is 5 centimeters, how long is this part in centimeters?
一个精密零件画在比例尺为20：1的图纸上是5厘米，这个零件长多少厘米．
<gadget id="calculator">20 / 1</gadget>
<output>20</output>

<gadget id="calculator">5 / 20</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>