To make a cuboid glass jar without a cover, the length of the glass jar is 16 cm, the width is 10 cm, and the height is 5 cm. At least one square centimeter of glass is needed?
制作一个无盖的长方体玻璃缸，玻璃缸的长是16厘米，宽是10厘米，高是5厘米，至少需要的是平方厘米的玻璃？
<gadget id="calculator">16 * 10</gadget>
<output>160</output>

<gadget id="calculator">16 * 5 * 2</gadget>
<output>160</output>

<gadget id="calculator">10 * 5 * 2</gadget>
<output>100</output>

<gadget id="calculator">160 + 160 + 100</gadget>
<output>420</output>

<result>420</result>