A cuboid glass fish tank without a cover is 30 cm long, 20 cm wide, and 15 cm high. How many square centimeters of glass are needed to make such a fish tank?
一个无盖的长方体玻璃鱼缸，长30厘米，宽20厘米，高15厘米，做这样一个鱼缸需要多少平方厘米的玻璃．
<gadget id="calculator">600 + 450 + 600</gadget>
<output>1_650</output>

<result>1_650</result>