A part is 12 cm long, and the length drawn on the design drawing is 24 mm. What is the scale of this drawing?
一个零件长12厘米，画在设计图上的长度是24毫米，这幅图的比例是多少
<gadget id="calculator">24 / 12 / 10</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>