Use a 4003.5cm**2 iron sheet to make an uncovered iron drum with a bottom radius of 10cm. What is the height of the iron drum?
用4003.5cm**2的铁皮做一个底面半径是10cm的无盖铁桶，铁桶的高是多少？
<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100</gadget>
<output>314</output>

<gadget id="calculator">4_003.5 - 314</gadget>
<output>3_689.5</output>

<gadget id="calculator">3.14 * 10 * 2</gadget>
<output>62.8</output>

<gadget id="calculator">3_689.5 / 62.8</gadget>
<output>58.75</output>

<result>58.75</result>