Two ships, A and B, sail from A to B at the same time. After 18 hours, ship A falls 120.6 km behind ship B. It is known that ship A travels 36.5 km per hour. How many kilometers does ship B travel per hour?
甲、乙两船同时从A开往B，经过18小时后，甲船落在乙船后面120.6km，已知甲船每小时行36.5km，乙船每小时行多少千米？
<gadget id="calculator">120.6 / 18</gadget>
<output>6.7</output>

<gadget id="calculator">6.7 + 36.5</gadget>
<output>43.2</output>

<result>43.2</result>