Grandpa wants to make a birdcage with a length of 30cm, a width of 20cm and a height of 15cm. He first made a rectangular parallelepiped frame. How many centimeters of bamboo strips does this frame need at least?
爷爷想做一个长30cm，宽20cm，高15cm的鸟笼子．他先做了一个长方体框架，这个框架至少需要多少厘米的竹条？
<gadget id="calculator">30 + 20 + 15</gadget>
<output>65</output>

<gadget id="calculator">65 * 4</gadget>
<output>260</output>

<result>260</result>