On a precision instrument drawing with a scale of 20:1, the length of a part is measured to be 54mm. What is the actual length of this part?
在一张比例尺是20：1的精密仪器图纸上，量得一零件的长是54mm，这个零件的实际长度是多长？
<gadget id="calculator">20 / 1</gadget>
<output>20</output>

<gadget id="calculator">54 / 20</gadget>
<output>27/10 = around 2.7</output>

<result>27/10 = around 2.7</result>