The school builds a cuboid water tank with a length of 2m, a width of 1.5m and a height of 0.8m. How many square meters of iron sheet is needed to make this water tank?
学校做一个长方体水箱，长2m，宽1.5m，高0.8m．做这个水箱至少需要多少平方米铁皮？
<gadget id="calculator">2 * 1.5</gadget>
<output>3</output>

<gadget id="calculator">2 * 0.8</gadget>
<output>1.6</output>

<gadget id="calculator">1.5 * 0.8</gadget>
<output>1.2</output>

<gadget id="calculator">3 + 1.6 + 1.2</gadget>
<output>5.8</output>

<gadget id="calculator">5.8 * 2</gadget>
<output>11.6</output>

<result>11.6</result>