There is a cube of iron with a side length of 2 decimeters. Now it is melted and cast into 4 identical cuboids. The cross-sectional size of each cuboid is 5cm*10cm. What is the surface area of each cuboid?
有一块棱长是2分米的正方体铁块，现在要把它熔铸成4个相同的长方体，每个长方体的横截面规格为5cm*10cm，那么每个长方体的表面积是多少？
<gadget id="calculator">5 * 10</gadget>
<output>50</output>

<gadget id="calculator">10 / 4 / 50</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">5 * 2 * 10 * 2 * 10 * 2 * (1/20)</gadget>
<output>200</output>

<gadget id="calculator">10 * 2 * 10 * 2 * 10 * 2 * (1/20)</gadget>
<output>400</output>

<gadget id="calculator">50 + 200 + 400</gadget>
<output>650</output>

<gadget id="calculator">650 * 2</gadget>
<output>1_300</output>

<result>1_300</result>