Five colored ropes with lengths of 6 cm, 7 cm, 3 cm, 4 cm, and 5 cm respectively, what is their average length in cm?
五根长度分别是6厘米、7厘米、3厘米、4厘米、5厘米的彩绳，它们的平均长度为多少厘米．
<gadget id="calculator">6 + 7 + 3 + 4 + 5</gadget>
<output>25</output>

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

<result>5</result>