A cylindrical teacup without a lid has a base diameter and a height of 10 cm, what is its surface area in square centimeters?
一个无盖的圆柱形茶杯，它的底面直径和高都是10厘米，它的表面积是多少平方厘米．
<gadget id="calculator">3.14 * 10 * 10</gadget>
<output>314</output>

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