swimmer swims against the current and loses an empty water jug on bridge A. The water jug floats on the surface and drifts with the water. The swimmer continued to swim upstream for 1 hour to reach Bridge D, and found that the water bottle was missing. After resting for 12 minutes, he swam back to find the water bottle. After swimming for another 1.05 hours, he found the water bottle at Bridge B. Find how many times the distance between the two bridges AD is the distance between the two bridges AB.
一个游泳者逆流游泳，在A桥遗失一只空水壶，水壶浮在水面，随水漂流．游泳者继续逆泳了1小时到达D桥，发觉水壶遗失，休息了12分钟再游回去找寻水壶，又游了1.05小时后，在B桥找到了水壶．求AD两桥的距离是AB两桥距离的几倍．
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">1 + 1.05 + 0.2</gadget>
<output>2.25</output>

<gadget id="calculator">3 / 2.25</gadget>
<output>1.333333</output>

<result>1.333333</result>