A cuboid wood with a cross-sectional area of 1 square meter is sawed into two sections along the cross-section of the wood, and the surface area is increased by how many square meters compared with the original.
把一根横截面积是1平方米大的长方体木料，沿木料的横截面锯成2段，表面积比原来增加了多少平方米．
<gadget id="calculator">1 * 2</gadget>
<output>2</output>

<result>2</result>