When a rectangle is enlarged by 4:1, how many times its original area will be enlarged?
把一个长方形按4：1放大后，面积扩大到原来的多少倍．
<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<gadget id="calculator">2 * 1</gadget>
<output>2</output>

<gadget id="calculator">32 / 2</gadget>
<output>16</output>

<result>16</result>