Draw the largest circle in a rectangle with a length of 4 decimeters and a width of 3 decimeters. What is the area of this circle?
在一个长4分米，宽3分米的长方形里画一个最大的圆，这个圆的面积是多少．
<gadget id="calculator">1.5 ** 2</gadget>
<output>2.25</output>

<gadget id="calculator">3.14 * 2.25</gadget>
<output>7.065</output>

<result>7.065</result>