Uncle Zhang made 10 cuboid chimneys with a length of 0.8 meters, a width of 0.5 meters and a height of 5 meters with iron sheets. May I ask: How many square meters of iron sheet did Uncle Zhang use?
张叔叔用铁皮做了10个长0.8米，宽0.5米，高5米的长方体烟囱．请问：张叔叔用了多少平方米的铁皮？
<gadget id="calculator">0.8 * 5</gadget>
<output>4</output>

<gadget id="calculator">0.5 * 5</gadget>
<output>2.5</output>

<gadget id="calculator">4 + 2.5</gadget>
<output>6.5</output>

<gadget id="calculator">6.5 * 2 * 10</gadget>
<output>130</output>

<result>130</result>