What is the sum of the side lengths of the cuboid if 3 cubes with side lengths of 10 cm are put together to form a cuboid?
用棱长都是10厘米的3个正方体拼成一个长方体，这个长方体的棱长之和是多少厘米．
<gadget id="calculator">10 * 3</gadget>
<output>30</output>

<gadget id="calculator">30 + 10 + 10</gadget>
<output>50</output>

<gadget id="calculator">50 * 4</gadget>
<output>200</output>

<result>200</result>