Teacher Wang took 18 students to the park to paint. The ticket office said: 5 yuan per ticket, and 4 yuan per ticket for more than 10 people. What is the minimum price for Mr. Wang to buy tickets from the ticket office?
王老师带18个学生去公园画画，售票处写着：每张5元，超过10人每张4元，王老师从售票处购票最少要几元？
<gadget id="calculator">18 + 1</gadget>
<output>19</output>

<gadget id="calculator">4 * 19</gadget>
<output>76</output>

<result>76</result>