A piece of rectangular paper is 16 decimeters long and 9 decimeters wide. After cutting out the largest square, what is the area of the remaining piece of paper?
一张长方形纸，长16分米，宽9分米，剪下一个最大的正方形后，剩下纸片的面积是多少平方分米？
<gadget id="calculator">16 - 9</gadget>
<output>7</output>

<gadget id="calculator">9 * 7</gadget>
<output>63</output>

<result>63</result>