To make a cuboid drawer with a length of 40 cm, a width of 18 cm, and a height of 8 cm, how many square decimeters of wooden boards are needed at least?
做一个长方体抽屉，长40厘米，宽18厘米，高8厘米，至少需要木板多少平方分米？
<gadget id="calculator">40 * 8</gadget>
<output>320</output>

<gadget id="calculator">18 * 8</gadget>
<output>144</output>

<gadget id="calculator">320 + 144</gadget>
<output>464</output>

<gadget id="calculator">464 * 2</gadget>
<output>928</output>

<gadget id="calculator">40 * 18</gadget>
<output>720</output>

<gadget id="calculator">928 + 720</gadget>
<output>1_648</output>

<gadget id="calculator">1_648 / 100</gadget>
<output>412/25 = around 16.48</output>

<result>412/25 = around 16.48</result>