Two paper tapes, the longer one is 23cm, and the shorter one is 15cm. After cutting the same section of the two paper tapes, the length of the longer paper tape is quite large among the remaining two paper tapes. Twice the length of the shorter strip, what is the minimum length to cut?
两条纸带，较长的一条为23cm，较短的一条为15cm，把两条纸带剪下同样的一段后，剩下的两条纸带中，要求较长的纸带的长度不少于较短的纸带长度的两倍，那么剪下的长度至少是多少？
<gadget id="calculator">30 - 23</gadget>
<output>7</output>

<result>7</result>