The scale of a part drawing is 1:5, and the measured size on the drawing is 2 cm. What is the actual size of the part in centimeters?
一张零件图的比列尺是1：5，量得图上的尺寸是2厘米，这个零件的实际尺寸是多少厘米．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">2 / (1/5)</gadget>
<output>10</output>

<result>10</result>