Two ships, A and B, set off from a pier at the same time in opposite directions. They sail for 5 hours. The distance between the two ships is 225 kilometers. Ship A travels 19.5 kilometers per hour. How many kilometers does ship B travel per hour?
甲、乙两艘轮船同时从一个码头向相反方向开出，航行了5小时，两船相距225千米，甲船每小时行19.5千米，乙船每小时行多少千米？
<gadget id="calculator">19.5 * 5</gadget>
<output>97.5</output>

<gadget id="calculator">225 - 97.5</gadget>
<output>127.5</output>

<gadget id="calculator">127.5 / 5</gadget>
<output>25.5</output>

<result>25.5</result>