On a drawing with a scale of 20:1, the length of a part is measured as 2 cm, what is the actual length of this part in mm?
在一个比例尺是20：1的图纸上，量得一个零件的长是2厘米，这个零件实际长多少毫米．
<gadget id="calculator">2 / 20</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) * 10</gadget>
<output>1</output>

<result>1</result>