To make a cuboid iron box with a length of 1.5 meters, a width of 0.7 meters, and a height of 2 meters, how many square meters of iron sheet are needed?
要做一个长1.5米，宽0.7米，高2米的长方体铁箱，需要多少平方米铁皮？
<gadget id="calculator">1.5 * 0.7</gadget>
<output>1.05</output>

<gadget id="calculator">1.5 * 2</gadget>
<output>3</output>

<gadget id="calculator">0.7 * 2</gadget>
<output>1.4</output>

<gadget id="calculator">1.05 + 3 + 1.4</gadget>
<output>5.45</output>

<gadget id="calculator">5.45 * 2</gadget>
<output>10.9</output>

<result>10.9</result>