A cuboid wooden box has a length of 10dm, a width of 7.5dm, and a height of 5dm. How many square decimeters of boards should be used to make this wooden box?
一只长方体木箱，长10dm，宽7.5dm，高5dm，做这只木箱至少要用多少平方分米的木板？
<gadget id="calculator">10 * 7.5</gadget>
<output>75</output>

<gadget id="calculator">10 * 5</gadget>
<output>50</output>

<gadget id="calculator">7.5 * 5</gadget>
<output>37.5</output>

<gadget id="calculator">75 + 50 + 37.5</gadget>
<output>162.5</output>

<gadget id="calculator">162.5 * 2</gadget>
<output>325</output>

<result>325</result>