The surface area of a cylinder is 628 square centimeters, the circumference of the base is 31.4 centimeters, what is its height in centimeters?
一个圆柱的表面积是628平方厘米，底面周长是31.4厘米，它的高是多少厘米．
<gadget id="calculator">31.4 / 3.14 / 2</gadget>
<output>5</output>

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

<gadget id="calculator">3.14 * 25</gadget>
<output>78.5</output>

<gadget id="calculator">78.5 * 2</gadget>
<output>157</output>

<gadget id="calculator">628 - 157</gadget>
<output>471</output>

<gadget id="calculator">471 / 31.4</gadget>
<output>15</output>

<result>15</result>