On a drawing with a scale of (30/1), the thickness of a machine part is measured to be 3 cm. What is the actual thickness of the part in cm?
在比例尺为(30/1)的图纸上，量得一机器零件厚度为3厘米，这个零件的实际厚度为多少厘米．
<gadget id="calculator">30 / 1</gadget>
<output>30</output>

<gadget id="calculator">3 / 30</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>