A cuboid iron box (without cover), 18 cm long, 15 cm wide, and 10 cm high. How much iron sheet does it take to make this tin box?
一个长方体铁盒(无盖)，长18厘米，宽15厘米，高10厘米．做这个铁盒需要用多少铁皮？
<gadget id="calculator">18 * 15</gadget>
<output>270</output>

<gadget id="calculator">18 * 10 * 2</gadget>
<output>360</output>

<gadget id="calculator">15 * 10 * 2</gadget>
<output>300</output>

<gadget id="calculator">270 + 360 + 300</gadget>
<output>930</output>

<result>930</result>