A person needs to take a car from point A to point B, and needs to take a train from point B to point C. Originally, the transportation fee from point A to point C is 250 yuan; now, the bus ticket has increased by 10%, and the train ticket has increased by 20%. As a result, a total of 280 yuan was spent from point A to point B. How much is the bus ticket now?
一个人从A地到B地要乘汽车，从B地到C地需乘火车，原来从A地到C地需要250元的交通费；现由于汽车票上涨10%，火车票上涨20%，结果从A地到B地共花去280元，汽车票现在要用多少元？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">20 / (1/10)</gadget>
<output>200</output>

<gadget id="calculator">200 * 1.1</gadget>
<output>220</output>

<result>220</result>