On May 1 Labor Day, the school organized 28 teachers to climb Fragrant Hills, and each ticket was 60 yuan. The ticket office says: You can get a free ticket for every 10 you buy. How much does it cost to buy tickets?
五一劳动节，学校组织28名老师去登香山，每张门票60元．售票处写着：每买10张可以赠送一张票．买门票共需要多少钱？
<gadget id="calculator">10 * 60 * 2</gadget>
<output>1_200</output>

<gadget id="calculator">8 - 2</gadget>
<output>6</output>

<gadget id="calculator">6 * 60</gadget>
<output>360</output>

<gadget id="calculator">1_200 + 360</gadget>
<output>1_560</output>

<result>1_560</result>