A cuboid glass fish tank without a cover is 8 decimeters long, 2.5 decimeters wide, and 5 decimeters high. What is the minimum square decimeter of glass needed to make this fish tank?
一个长方体无盖玻璃鱼缸，长8分米、宽2.5分米、高5分米．制作这个鱼缸至少需要玻璃多少平方分米？
<gadget id="calculator">8 * 2.5</gadget>
<output>20</output>

<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<gadget id="calculator">2.5 * 5</gadget>
<output>12.5</output>

<gadget id="calculator">40 + 12.5</gadget>
<output>52.5</output>

<gadget id="calculator">52.5 * 2</gadget>
<output>105</output>

<gadget id="calculator">20 + 105</gadget>
<output>125</output>

<result>125</result>