A piece of cuboid wood has a cross-sectional area of 0.3 square decimeters. When it is cut into 3 sections, how many square decimeters does the cross-sectional area increase?
一块长方体木料，截面积是0.3平方分米，截成3段后，截面积增加了多少平方分米．
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">0.3 * 2 * 2</gadget>
<output>1.2</output>

<result>1.2</result>