Find the surface area of a cylinder with a base diameter of 1 cm and a height of 10 cm.
求一个底面直径是1厘米，高是10厘米的圆柱的表面积．
<gadget id="calculator">3.14 * 1 * 10</gadget>
<output>31.4</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) ** 2</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3.14 * (1/4) * 2</gadget>
<output>1.57</output>

<gadget id="calculator">31.4 + 1.57</gadget>
<output>32.97</output>

<result>32.97</result>