How much iron sheet is needed to make a cuboid water tank with a length of 6 decimeters, a width of 5 decimeters and a height of 4 decimeters without a cover?
用铁皮做一个长6分米，宽5分米，高4分米的没盖的长方体水箱，至少需要多少铁皮？
<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<gadget id="calculator">6 * 4 * 2</gadget>
<output>48</output>

<gadget id="calculator">5 * 4 * 2</gadget>
<output>40</output>

<gadget id="calculator">30 + 48 + 40</gadget>
<output>118</output>

<result>118</result>