A cylindrical piece of wood with a length of 3.5m is sawed into two equal parts, and the surface area is increased by exactly 2.2dm**2. What is the volume of this piece of wood?
一根长3.5m的圆柱形木料，把它平均锯成两段，表面积正好增加了2.2dm**2，这根木料的体积是多少？
<gadget id="calculator">2.2 / 2</gadget>
<output>1.1</output>

<gadget id="calculator">3.5 * 10</gadget>
<output>35</output>

<gadget id="calculator">1.1 * 35</gadget>
<output>38.5</output>

<result>38.5</result>