Use 112cm wire to form a cuboid frame. The ratio of length, width and height is 4:2:1. A layer of paper is to be pasted on the surface of the cuboid. What is the surface area of the cuboid in cm**2.
用112cm的铁丝围成一个长方体框架，长，宽，高的比是4：2：1，要在这个长方体表面糊一层纸，长方体的表面积是多少cm**2．
<gadget id="calculator">112 / 4</gadget>
<output>28</output>

<gadget id="calculator">4 + 2 + 1</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">28 * (4/7) * 28 * (2/7)</gadget>
<output>128</output>

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">28 * (2/7) * 28 * (1/7)</gadget>
<output>32</output>

<gadget id="calculator">28 * (4/7) * 28 * (1/7)</gadget>
<output>64</output>

<gadget id="calculator">128 + 32 + 64</gadget>
<output>224</output>

<gadget id="calculator">224 * 2</gadget>
<output>448</output>

<result>448</result>