A large rectangular parallelepiped wardrobe is 0.9 meters long, 0.5 meters wide, and 1.8 meters high. If the front and left and right sides are painted, how many square meters is the painted area?
一个长方体的大衣柜，长0.9米，宽0.5米，高1.8米，在它的正面和左右两面刷油漆，刷油漆的面积至少是多少平方米？
<gadget id="calculator">1.8 * 0.9</gadget>
<output>1.62</output>

<gadget id="calculator">1.8 * 0.5 * 2</gadget>
<output>1.8</output>

<gadget id="calculator">1.62 + 1.8</gadget>
<output>3.42</output>

<result>3.42</result>