Xiaoming’s family is going to make a glass fish tank with a length of 90 cm, a width of 60 cm, and a height of 85 cm. How many square centimeters of glass is needed to make this fish tank?
小明家要做一个长90厘米，宽60厘米，高85厘米的玻璃鱼缸，做这个鱼缸至少需要多少平方厘米的玻璃才够？
<gadget id="calculator">90 * 60</gadget>
<output>5_400</output>

<gadget id="calculator">60 * 85</gadget>
<output>5_100</output>

<gadget id="calculator">85 * 90</gadget>
<output>7_650</output>

<gadget id="calculator">5_100 + 7_650</gadget>
<output>12_750</output>

<gadget id="calculator">12_750 * 2</gadget>
<output>25_500</output>

<gadget id="calculator">5_400 + 25_500</gadget>
<output>30_900</output>

<result>30_900</result>