A cuboid block of wood is 4 meters long and has an area of 0.05 square meters. If it is sawn into 4 sections of 1 meter long wood. How many square meters has the surface area increased?
一把长方体的木块长4米，截成的面积是0.05平方米．如果把它锯成4段1米长的木料．表面积增加了多少平方米．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">0.05 * 3 * 2</gadget>
<output>0.3</output>

<result>0.3</result>