A precision part is 8 mm long. How long should it be drawn on a 20:1 drawing?
一种精密零件长8毫米，把它画在20：1的图纸上，应画多长？
<gadget id="calculator">20 / 10</gadget>
<output>2</output>

<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<result>16</result>