Person A and Person B ride bicycles from places A and B respectively and drive towards each other. The speeds of Person A and Party B are 25 km/h and 20 km/h respectively. After the two cars met, A rested for 36 minutes, and then moved forward at a speed of 20 km/h. B did not rest, and moved forward at (3/4) the original speed. When A arrives at B, B is still 9 kilometers away from A. So how many hours did it take B to travel from point B to point A?
甲乙两人分别从A、B两地骑车出发，相向而行，甲乙的速度分别是25千米/小时和20千米/小时．两车相遇后甲休息了36分钟，再以20千米/小时的速度前进，乙没有休息，并以原速度的(3/4)前进．当甲到B地时，乙离A地还差9千米．那么乙从B地到A地共用了多少小时？
<gadget id="calculator">9 + 9</gadget>
<output>18</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">9 * 9</gadget>
<output>81</output>

<gadget id="calculator">81 / 9</gadget>
<output>9</output>

<gadget id="calculator">4 / 20</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">9 * (1/5)</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">20 * (3/4)</gadget>
<output>15</output>

<gadget id="calculator">5 / 15</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">9 * (1/3)</gadget>
<output>3</output>

<gadget id="calculator">(9/5) + 3</gadget>
<output>24/5 = around 4.8</output>

<result>24/5 = around 4.8</result>