A precision part is 20mm long. Draw it on a plan with a scale of 1:10. What is the length of the part in cm?
一种精密零件长20mm，把它画在比例尺是1：10的平面图上，零件长应画多少cm．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) / 10</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">20 * (1/100)</gadget>
<output>1/5 = around 0.2</output>

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