A section of square steel is 2 decimeters long and has a square cross section. After sawing it into two equal sections, the surface area increases by 8 square centimeters compared to the original one. What is the surface area of the original cuboid square steel in square centimeters?
一段方钢，长2分米，横截面是正方形，把它锯成相等的两段后，表面积比原来增加8平方厘米，原来这个长方体方钢的表面积是多少平方厘米．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">2 * 4 * 2 * 10</gadget>
<output>160</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">160 + 8</gadget>
<output>168</output>

<result>168</result>