The volume of a cylinder is 125.6 cubic centimeters. The diameter of the base is 4 cm, what is its lateral area in square centimeters?
一个圆柱体的体积是125.6立方厘米．底面直径是4厘米，它的侧面积是多少平方厘米．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">125.6 / 12.56</gadget>
<output>10</output>

<gadget id="calculator">3.14 * 4 * 10</gadget>
<output>125.6</output>

<result>125.6</result>