Two cars, A and B, drive from A and B respectively at the same time. It is known that A travels 70 kilometers per hour, and B's speed is (4/5) that of A. After 5 hours, A and B meet each other. How many miles is the distance between B and B?
甲，乙两辆汽车分别从A，B两地同时相对开出，已知甲车每小时行70千米，乙车的速度是甲车的(4/5)，经过5小时相遇，A，B两地相距多少千米？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">70 * (4/5)</gadget>
<output>56</output>

<gadget id="calculator">70 + 56</gadget>
<output>126</output>

<gadget id="calculator">126 * 5</gadget>
<output>630</output>

<result>630</result>