A piece of rectangular paper has a length of 18 cm and a width of 16 cm. If you use it to cut out the largest circle, what is the remaining area?
一张长方形纸，长是18厘米，宽是16厘米，若用它剪下一个最大的圆后，剩下的面积是多少？
<gadget id="calculator">18 * 16</gadget>
<output>288</output>

<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">8 ** 2</gadget>
<output>64</output>

<gadget id="calculator">3.14 * 64</gadget>
<output>200.96</output>

<gadget id="calculator">288 - 200.96</gadget>
<output>87.04</output>

<result>87.04</result>