Make an uncovered cuboid oil barrel with iron sheets, the length and width are 4 decimeters, and the height is 6 decimeters. How many square decimeters are used for the iron sheets?
用铁皮做一个无盖的长方体油桶，长和宽都是4分米，高6分米，用铁皮多少平方分米？
<gadget id="calculator">4 * 4</gadget>
<output>16</output>

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

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

<gadget id="calculator">16 + 24 + 24</gadget>
<output>64</output>

<gadget id="calculator">64 * 2</gadget>
<output>128</output>

<gadget id="calculator">128 - 16</gadget>
<output>112</output>

<result>112</result>