A 2-meter-long cuboid wood has a square cross-section. After sawing the wood into two sections parallel to the cross-section, the surface area increases by 0.18 square meters. Calculate the surface area of the original wood.
一根长2米的长方体木材，它的横断面是正方形，把木材沿平行于横断面的方向锯成2段后，表面积增加了0.18平方米，求原木材的表面积．
<gadget id="calculator">0.3 * 0.3</gadget>
<output>0.09</output>

<gadget id="calculator">0.3 * 2</gadget>
<output>0.6</output>

<gadget id="calculator">0.09 + 0.6 + 0.6</gadget>
<output>1.29</output>

<gadget id="calculator">1.29 * 2</gadget>
<output>2.58</output>

<result>2.58</result>