A wooden box is 9 decimeters long, 6 decimeters wide, and 4 decimeters high. To make 10 such wooden boxes (with covers), how many square meters of wooden boards are needed at least?
一只木箱长9分米，宽6分米，高4分米，做这样的木箱10只(有盖)，至少需用木板多少平方米？
<gadget id="calculator">9 * 6</gadget>
<output>54</output>

<gadget id="calculator">9 * 4</gadget>
<output>36</output>

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

<gadget id="calculator">54 + 36 + 24</gadget>
<output>114</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">114 * 2 * (1/10)</gadget>
<output>114/5 = around 22.8</output>

<result>114/5 = around 22.8</result>