A cuboid water tank without a cover has a base of a square with a perimeter of 160 cm and a height of 80 cm. To make such a water tank, how many square decimeters of iron sheet are needed at least?
一种长方体无盖水箱，底面是周长为160厘米的正方形，高80厘米．做这样一个水箱，至少需铁皮多少平方分米？
<gadget id="calculator">160 / 4 / 10</gadget>
<output>4</output>

<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">80 / 10</gadget>
<output>8</output>

<gadget id="calculator">4 * 8 * 4</gadget>
<output>128</output>

<gadget id="calculator">16 + 128</gadget>
<output>144</output>

<result>144</result>