Put together 3 cubes with side lengths of 5 meters to form a cuboid, what is the sum of the side lengths of this cuboid?
把棱长是5米的3个正方体拼成一个长方体，这个长方体的棱长总和是多少米
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">15 + 5 + 5</gadget>
<output>25</output>

<gadget id="calculator">25 * 4</gadget>
<output>100</output>

<result>100</result>