A cuboid iron box is 16 cm long, 10 cm wide, and 5 cm high. How many square centimeters of iron sheet is needed to make this iron box?
一个长方体的铁盒，长16厘米，宽10厘米，高5厘米．做这个铁盒至少需要多少平方厘米的铁皮？
<gadget id="calculator">16 * 10</gadget>
<output>160</output>

<gadget id="calculator">16 * 5</gadget>
<output>80</output>

<gadget id="calculator">10 * 5</gadget>
<output>50</output>

<gadget id="calculator">160 + 80 + 50</gadget>
<output>290</output>

<gadget id="calculator">290 * 2</gadget>
<output>580</output>

<result>580</result>