A salesperson in a shop uses a packing rope to tie a shoe box with a length of 30 cm, a width of 15 cm, and a height of 10 cm. The joint is 20 cm. What is the minimum length of rope needed to tie the shoe box?
商店售货员用包装绳扎一个长为30厘米、宽为15厘米、高为10厘米的鞋盒，接头处为20厘米，扎这个鞋盒至少需要多长绳子？
<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<gadget id="calculator">15 * 2</gadget>
<output>30</output>

<gadget id="calculator">10 * 4</gadget>
<output>40</output>

<gadget id="calculator">60 + 30 + 40 + 20</gadget>
<output>150</output>

<result>150</result>