A person rides a motorcycle from city A to city B. In the first hour, he traveled 38 kilometers, and in the second hour he traveled the whole distance (1/3). At this time, he was 63 kilometers away from city A. How many kilometers are there between cities A and B?
某人骑摩托车从甲市到乙市．第一小时行了38千米，第二小时行了全程的(1/3)，这时离甲市63千米，甲乙两市相距多少千米？
<gadget id="calculator">63 - 38</gadget>
<output>25</output>

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

<gadget id="calculator">25 / (1/3)</gadget>
<output>75</output>

<result>75</result>