There is a ratio of 400:1 on a drawing. This ratio tells us how many times the drawing is magnified and drawn.
在一张图纸上有400：1这样一个比例，这个比例告诉我们是这张图纸是将实物放大多少倍画出来
<gadget id="calculator">400 / 1</gadget>
<output>400</output>

<gadget id="calculator">400 / 1 / 1</gadget>
<output>400</output>

<result>400</result>