Zhang and Wang set off from A at the same time on motorcycles and proceed along the same road. Zhang's speed is 6 kilometers per hour faster than Wang's. Zhang arrived at B 20 minutes earlier than Wang, and continued to move forward. When Wang arrived at B, Zhang had traveled 20 kilometers further than Wang. So, what is the distance in miles between A and B?
张，王两人骑摩托车同时从甲地出发，沿着同一条公路前进，张的速度比王的速度每小时快6千米．张比王早20分钟到达乙地，又继续前进．当王到达乙地时，张比王已经多走了20千米．那么，甲、乙两地的距离是多少千米．
<gadget id="calculator">10 - 9</gadget>
<output>1</output>

<gadget id="calculator">6 * 1 * 10</gadget>
<output>60</output>

<gadget id="calculator">60 * 3</gadget>
<output>180</output>

<result>180</result>