A cuboid carton is 30cm long, 25cm wide, and 20cm high. How many ribbons are needed to glue the corners of the carton with colored ribbons?
一个长方体的纸盒长30cm、宽25cm、高20cm，要把纸盒的棱角都粘上彩色丝带，共需要多少丝带？
<gadget id="calculator">30 + 25 + 20</gadget>
<output>75</output>

<gadget id="calculator">75 * 4</gadget>
<output>300</output>

<result>300</result>