A part is 6 mm long, how many centimeters should it be drawn on a drawing with a scale of 40:1.
一个零件长是6毫米，画在比例尺为40：1的图纸上要画多少厘米长．
<gadget id="calculator">40 / 1</gadget>
<output>40</output>

<gadget id="calculator">40 / 10</gadget>
<output>4</output>

<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<result>24</result>