The area of a square is 16 square centimeters after the side length is reduced by 1:3. What is the area of this square in square centimeters?
一个正方形把边长按1：3缩小后的面积是16平方厘米，这个正方形的面积是多少平方厘米．
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">16 * 9</gadget>
<output>144</output>

<result>144</result>