How many square decimeters of cardboard is needed to paste a cuboid carton whose bottom surface is a square with a side length of 5 decimeters and a height of 2 decimeters?
糊一个底面是边长5分米的正方形，高2分米的长方体纸盒，需要多少平方分米的硬纸板？
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">25 * 2</gadget>
<output>50</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">10 * 4</gadget>
<output>40</output>

<gadget id="calculator">50 + 40</gadget>
<output>90</output>

<result>90</result>