The new department store is 45 meters long, 30 meters wide and 40 meters high. In order to add to the atmosphere during the festival, it is necessary to install colored light lines on each side of the building. How many meters of colored light lines should be purchased at least?
新造的百货大楼长45米，宽30米，高40米．节日里为增添气氛，要在大楼的每条边装上彩灯线，至少要买多少米彩灯线？
<gadget id="calculator">45 * 2</gadget>
<output>90</output>

<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<gadget id="calculator">40 * 4</gadget>
<output>160</output>

<gadget id="calculator">90 + 60 + 160</gadget>
<output>310</output>

<result>310</result>