Use a 40 decimeter long iron wire to make a rectangular parallelepiped frame so that its height is 4 decimeters, and the ratio of length to width is 1:1. Then paste five batters on paper to make a rectangular parallelepiped lantern. How many square decimeters of paper is needed?
用一根长40分米的铁丝做一个长方体的框架，使它的高为4分米，长、宽的比是1：1，再把它五个面糊上纸，做成一个长方体的灯笼，至少需要多少平方分米的纸？
<gadget id="calculator">40 / 4</gadget>
<output>10</output>

<gadget id="calculator">10 - 4</gadget>
<output>6</output>

<gadget id="calculator">1 + 1</gadget>
<output>2</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">3 * 4 * 4</gadget>
<output>48</output>

<gadget id="calculator">9 + 48</gadget>
<output>57</output>

<result>57</result>