Make an uncovered cuboid glass cylinder, 50 cm long, 40 cm wide, and 60 cm high. How many square centimeters of glass is needed to make this glass jar?
做一个无盖的长方体玻璃缸，长50厘米，宽40厘米，高60厘米．做这个玻璃缸至少需要玻璃多少平方厘米？
<gadget id="calculator">50 * 40</gadget>
<output>2_000</output>

<gadget id="calculator">50 * 60</gadget>
<output>3_000</output>

<gadget id="calculator">40 * 60</gadget>
<output>2_400</output>

<gadget id="calculator">3_000 + 2_400</gadget>
<output>5_400</output>

<gadget id="calculator">5_400 * 2</gadget>
<output>10_800</output>

<gadget id="calculator">2_000 + 10_800</gadget>
<output>12_800</output>

<result>12_800</result>