cuboid iron block with a side length of 1 decimeter is cast into a cuboid iron block with a rectangular bottom (20 cm long and 10 cm wide). What is the surface area of this cuboid in square centimeters?
将棱长是1分米的正方体铁块镕铸成一个底面是长方形(长20厘米、宽10厘米)的长方体铁块．这个长方体铁块的表面积是多少平方厘米．
<gadget id="calculator">20 * 1 * 10</gadget>
<output>200</output>

<gadget id="calculator">10 / 200</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">20 * 1 * 10 * 1 * 10 * 1 * (1/20)</gadget>
<output>100</output>

<gadget id="calculator">1 * 10 * 1 * 10 * 1 * 10 * 1 * (1/20)</gadget>
<output>50</output>

<gadget id="calculator">200 + 100 + 50</gadget>
<output>350</output>

<gadget id="calculator">350 * 2</gadget>
<output>700</output>

<result>700</result>