A cylinder has a base circumference of 23 cm and a height of 6 cm, what is the lateral area in square centimeters?
一个圆柱，底面周长是23厘米，高6厘米，侧面积是多少平方厘米．
<gadget id="calculator">23 * 6</gadget>
<output>138</output>

<result>138</result>