The train between Beijing and Harbin will stop at Tianjin, Tangshan, Shanhaiguan, Jinzhou, Shenyang, Siping, and Changchun along the way. How many different fare tickets will the railway department prepare for this train?
往返于北京到哈尔滨之间的火车沿途要停靠天津、唐山、山海关、锦州、沈阳、四平、长春7个站，铁路部门为这趟车一共要准备多少种不同票价车票？
<gadget id="calculator">8 + 7 + 6 + 5 + 4 + 3 + 2 + 1</gadget>
<output>36</output>

<result>36</result>