To make 10 cartons with a length of 8 decimeters and a width and height of 5 decimeters, at least how many square decimeters of paper are needed?
做10个长8分米，宽和高都是5分米的纸箱，至少需要多少平方分米的纸？
<gadget id="calculator">8 * 5 * 2</gadget>
<output>80</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">80 + 25</gadget>
<output>105</output>

<gadget id="calculator">105 * 2 * 10</gadget>
<output>2_100</output>

<result>2_100</result>