Each individual ticket in a park is 5 yuan, for 1 person to enter the park. Each group ticket is 30 yuan, for groups of no more than 10 people to enter the park. Buying 10 or more group tickets gives a 10% discount. For an autumn outing in a certain unit, the money originally prepared was just enough for tickets for 145 people. Two people were added temporarily. Each of these two people brought m yuan, and the result was 147 people. What is the value of m if they can all enter the park just in time?
某公园每张个人票5元，供1人入园．每张团体票30元，供不超过10人的团体入园．买10张或更多团体票优惠10%，某单位秋游，原来准备的钱刚好够145人的门票用，临时又增加了两个人，这两人每人带来了m元钱，结果147人刚好都能入园，则m的值是多少．
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">30 * (9/10)</gadget>
<output>27</output>

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

<gadget id="calculator">27 - 25</gadget>
<output>2</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<result>1</result>