Xiao Ming uses a cylindrical water cup with a bottom circumference of 18.84 cm and a height of 15 cm to measure the volume of a potato. He first adds water 6 cm high to the water cup, and then puts the potato in. The water surface rises to 12 cm. The volume of the potato is How many cubic centimeters is it?
小明利用一个底面周长18.84厘米、高15厘米的圆柱形水杯测量一个土豆的体积，他先在水杯中加上6厘米高的水，再放进土豆，水面上升到12厘米处，这个土豆体积是多少立方厘米？
<gadget id="calculator">18.84 / 2 / 3.14</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9</gadget>
<output>28.26</output>

<gadget id="calculator">28.26 * 12</gadget>
<output>339.12</output>

<gadget id="calculator">28.26 * 6</gadget>
<output>169.56</output>

<gadget id="calculator">339.12 - 169.56</gadget>
<output>169.56</output>

<result>169.56</result>