The area of a parallelogram is 63 square meters. Now the base is reduced by 3 times and the height remains the same. What is the area in square meters?
一个平行四边形的面积是63平方米，现在底缩小3倍，高不变，面积是多少平方米．
<gadget id="calculator">63 / 3</gadget>
<output>21</output>

<result>21</result>