A cylindrical chimney is surrounded by a piece of iron sheet with a length of 4m and a width of 0.3m. What is its lateral area in m**2.
用一块长4m，宽0.3m的铁皮围成一个圆柱形烟筒，它的侧面积是多少m**2．
<gadget id="calculator">4 * 0.3</gadget>
<output>1.2</output>

<result>1.2</result>