A cuboid of wood whose cross section is a square with side length 5 cm, how many square centimeters will the surface area increase when it is cut into two parts along the cross section?
一根长方体木料，横截面是边长为5厘米的正方形，沿横截面截成两段后，表面积增加了多少平方厘米．
<gadget id="calculator">5 * 5 * 2</gadget>
<output>50</output>

<result>50</result>