City A is 1275 kilometers away from City B. A truck delivers goods from City A to City B. It travels 75 kilometers per hour and returns at 85 kilometers per hour. The truck returns from City B to City A faster than from City A. How much time was saved when going to City B?
A城距离B城1275千米，一辆货车从A城送货去B城，每小时行驶75千米，返回时每小时行驶85千米，这辆货车从B城返回A城比从A城去B城时节省了多少时间？
<gadget id="calculator">1_275 / 75</gadget>
<output>17</output>

<gadget id="calculator">1_275 / 85</gadget>
<output>15</output>

<gadget id="calculator">17 - 15</gadget>
<output>2</output>

<result>2</result>