Cut out the largest circle on a piece of paper with a length of 4 cm and a width of 3 cm. What is the area of this circle in square centimeters?
在一张长4厘米，宽3厘米的纸上，剪一个最大的圆，这个圆的面积是多少平方厘米．
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) ** 2</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">3.14 * (9/4)</gadget>
<output>7.065</output>

<result>7.065</result>