The length of a machine part is 0.5 cm, what is its length on a drawing with a scale of 1:40?
一个机器零件的长度是0.5厘米，在比例尺1：40的图纸上，它的长度是多少？
<gadget id="calculator">1 / 40</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">0.5 * (1/40)</gadget>
<output>0.0125</output>

<result>0.0125</result>