A cylinder has a base radius of 5dm and a height of 10dm, what is the surface area of the cylinder in dm**2.
一个圆柱体的底面半径是5dm、高10dm，这个圆柱的表面积是多少dm**2．
<gadget id="calculator">3.14 * 5 * 2 * 10</gadget>
<output>314</output>

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

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

<gadget id="calculator">314 + 157</gadget>
<output>471</output>

<result>471</result>