If a square with an area of 25 square centimeters is reduced by 1:5, what is the area in square centimeters?
面积为25平方厘米的正方形按1：5缩小后，面积变为多少平方厘米．
<gadget id="calculator">5 / 5</gadget>
<output>1</output>

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

<result>1</result>