A body part with a length of 8 mm is drawn on a drawing with a scale of 25:1, how many cm should be drawn.
一个长8mm的机体零件画在比例尺为25：1的图纸上，应画多少cm．
<gadget id="calculator">25 / 1</gadget>
<output>25</output>

<gadget id="calculator">25 / 10</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">8 * (5/2)</gadget>
<output>20</output>

<result>20</result>