Make a cuboid iron box without a lid, 6 meters long, 2 meters wide, and 3 meters high. At least how many square meters of iron sheet is needed?
做一个不带盖的长方体铁盒，长6米，宽2米，高3米．至少需要多少平方米铁皮？
<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<gadget id="calculator">6 * 3 * 2</gadget>
<output>36</output>

<gadget id="calculator">2 * 3 * 2</gadget>
<output>12</output>

<gadget id="calculator">12 + 36 + 12</gadget>
<output>60</output>

<result>60</result>