The circumference of the bottom of a cylinder is 62.8 cm and the height is 3 decimeters. How many cubic centimeters should be cut off to make it into the largest cuboid?
一个圆柱体底面周长是62.8厘米，高3分米，把它加工成最大的长方体，应削去多少立方厘米．
<gadget id="calculator">62.8 / 3.14</gadget>
<output>20</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100 * 30</gadget>
<output>9_420</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">20 * 5 * 2 * 30</gadget>
<output>6_000</output>

<gadget id="calculator">9_420 - 6_000</gadget>
<output>3_420</output>

<result>3_420</result>