small carton whose length, width, and height are 50 cm, 40 cm, and 30 cm respectively, stick tape on all edges, at least how long is the tape?
一个长、宽、高分别为50厘米、40厘米、30厘米的小纸箱，在所有的棱上粘上胶带，至少需要多长的胶带？
<gadget id="calculator">50 + 40 + 30</gadget>
<output>120</output>

<gadget id="calculator">120 * 4</gadget>
<output>480</output>

<result>480</result>