A cuboid of wood has a base area of 10 square centimeters, cut it into two sections parallel to the bottom, and measure the increase in its surface area by how many square centimeters.
一根长方体木料，它的底面积是10平方厘米，沿平行于底面把它截成2段，测它的表面积增加多少平方厘米．
<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<result>20</result>