The inner diameter of a pressure cooker gasket is 24 cm and the width of the gasket is 1.5 cm. What is the area of the gasket in square centimeters?
一个高压锅垫圈的内直径是24厘米，垫圈宽1.5厘米，这个垫圈的面积是多少平方厘米？
<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">12 + 1.5</gadget>
<output>13.5</output>

<gadget id="calculator">13.5 ** 2</gadget>
<output>182.25</output>

<gadget id="calculator">3.14 * 182.25</gadget>
<output>572.265</output>

<gadget id="calculator">12 ** 2</gadget>
<output>144</output>

<gadget id="calculator">3.14 * 144</gadget>
<output>452.16</output>

<gadget id="calculator">572.265 - 452.16</gadget>
<output>120.105</output>

<result>120.105</result>