In the parade, the young pioneers holding flowers formed a hollow square around a float, with 13 people on each side of the outermost layer and 7 people on each side of the innermost layer, so how many young pioneers are there around the float?
游行队伍中，手持鲜花的少先队员在一辆彩车四周围成了一个空心方阵，最外面每边13人，最内层每边7人，那么彩车周围的少先队员有多少人．
<gadget id="calculator">169 - 25</gadget>
<output>144</output>

<result>144</result>