Zhang and Li started from A at the same time by bicycle and headed in the same direction. Zhang's speed is 4 kilometers per hour faster than Li's speed, and Zhang passed through B on the way 20 minutes earlier than Li. When Li arrives at B, Zhang has advanced another 8 kilometers, so how many kilometers is the distance between A and B?
张、李两人骑车同时从甲地出发，向同一方向行进．张的速度比李的速度每小时快4千米，张比李早20分钟通过途中乙地．当李到达乙地时，张又前进了8千米，那么甲、乙两地距离是多少千米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">8 / (1/3)</gadget>
<output>24</output>

<gadget id="calculator">24 - 4</gadget>
<output>20</output>

<gadget id="calculator">8 / 4</gadget>
<output>2</output>

<gadget id="calculator">20 * 2</gadget>
<output>40</output>

<result>40</result>