To make a cuboid wooden drawer with a length of 6 decimeters, a width of 40 centimeters, and a height of 3 decimeters, how many square meters of wooden boards are needed at least?
要做一个长6分米，宽40厘米，高3分米的长方体木制抽屉，至少需要多少平方米的木板？
<gadget id="calculator">40 / 10</gadget>
<output>4</output>

<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<gadget id="calculator">12 + 18</gadget>
<output>30</output>

<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<gadget id="calculator">60 + 24</gadget>
<output>84</output>

<gadget id="calculator">84 / 100</gadget>
<output>21/25 = around 0.84</output>

<result>21/25 = around 0.84</result>