5□5□5□5□5, please fill in the four symbols "+", "-", "*" and "/" in □ (fill in each symbol only once) to form a calculation formula. What is the maximum value of the result of the formula composed of various filling methods?
5□5□5□5□5，请在□中填入"+"、"-"、"*"、"/"四个符号(每个符号只填一次)，组成一个算式，在各种各样的填法组成的算式中，算式结果的最大值是多少．
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">5 / 5</gadget>
<output>1</output>

<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">25 + 4</gadget>
<output>29</output>

<result>29</result>