A car travels from city A to city B. It travels 70 kilometers per hour. After driving for 4 hours, it is still 35 kilometers away from city B. How many kilometers is the distance between city A and city B?
一辆汽车从甲城去乙城，它每小时行驶70千米，行驶了4小时距乙城还有35千米，甲、乙两城相距多少千米？
<gadget id="calculator">70 * 4</gadget>
<output>280</output>

<gadget id="calculator">280 + 35</gadget>
<output>315</output>

<result>315</result>