Use the drainage method to measure the volume of a potato: a cylindrical container with a diameter of 10cm and a depth of 18cm is filled with 10cm of water. The potato is completely submerged in the water. At this time, the water depth is 12cm. What is the volume of the potato in cubic centimeters?
用排水法测一个土豆的体积：圆柱形容器，直径10cm，深18cm，装有10cm深的水，把土豆完全沉入水中，这时水深12cm，这个土豆的体积是多少立方厘米？
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">12 - 10</gadget>
<output>2</output>

<gadget id="calculator">3.14 * 25 * 2</gadget>
<output>157</output>

<result>157</result>