The length of the table tennis table is 2800mm, the width is 1500mm, and the thickness of the table is 30mm. Its surface is sprayed with paint. How many square meters is the painted area?
乒乓球台的长度为2800mm、宽度为1500mm，台面厚度为30mm，它的表面喷上了漆，喷漆的面积是多少平方米？
<gadget id="calculator">2_800 * 1_500</gadget>
<output>4_200_000</output>

<gadget id="calculator">2_800 * 30 * 2</gadget>
<output>168_000</output>

<gadget id="calculator">1_500 * 30 * 2</gadget>
<output>90_000</output>

<gadget id="calculator">4_200_000 + 168_000 + 90_000</gadget>
<output>4_458_000</output>

<gadget id="calculator">4_458_000 / 1_000_000</gadget>
<output>2_229/500 = around 4.458</output>

<result>2_229/500 = around 4.458</result>