Mom and Dad took Xiaowen to the suburban park to play. When going there, they took an ordinary bus. The ticket was 5 yuan per person and half the price for children. When returning, take a luxury bus, 8.5 yuan per ticket, and children will not be reduced by half, so you need to buy 3 tickets. Calculate how much is the fare for Xiaowen's family for this outing trip?
爸爸妈妈带小雯去郊外公园玩，去时坐普通公交车，车票每人5元，小孩半票．返回时坐豪华大巴，每票8.5元，小孩不减半，因此需购3张车票．算算这次郊外游，小雯一家共用去多少车费？
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">8.5 * 3</gadget>
<output>25.5</output>

<gadget id="calculator">10 + (5/2) + 25.5</gadget>
<output>38</output>

<result>38</result>