To make a cuboid fish tank without a cover, the length is 7 decimeters, the width is 6 decimeters, and the height is 5 decimeters. How many square decimeters of glass is needed to make this fish tank? (Glass thickness is ignored)
要做一个无盖的长方体鱼缸，长7分米，宽6分米，高5分米，制作这个鱼缸时至少需要玻璃多少平方分米？(玻璃厚度忽略不计)
<gadget id="calculator">7 * 6</gadget>
<output>42</output>

<gadget id="calculator">7 * 5</gadget>
<output>35</output>

<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<gadget id="calculator">35 + 30</gadget>
<output>65</output>

<gadget id="calculator">65 * 2</gadget>
<output>130</output>

<gadget id="calculator">42 + 130</gadget>
<output>172</output>

<result>172</result>