Enlarge a rectangle by 3:1, that is, how many times each side of the rectangle is enlarged to its original size.
把一个长方形按3：1放大，也就是把长方形的各边分别放大到原来的多少倍．
<gadget id="calculator">3 / 1</gadget>
<output>3</output>

<result>3</result>