To make a cuboid wooden box with a length of 25 decimeters, a width of 7 decimeters, and a height of 4 decimeters, how many square decimeters of planks are needed at least?
做一个长25分米，宽7分米，高4分米的长方体木箱，至少需要木板多少平方分米？
<gadget id="calculator">25 * 7</gadget>
<output>175</output>

<gadget id="calculator">25 * 4</gadget>
<output>100</output>

<gadget id="calculator">7 * 4</gadget>
<output>28</output>

<gadget id="calculator">175 + 100 + 28</gadget>
<output>303</output>

<gadget id="calculator">303 * 2</gadget>
<output>606</output>

<result>606</result>