Two ships, A and B, depart from two docks 580 kilometers apart at the same time. After 5 o'clock, the distance between the two ships is 340 kilometers. During this period, the two ships have not encountered each other. How many kilometers?
甲、乙两只轮船同时从相距580千米的两个码头相向开出，5时后还相隔340千米，期间两船没有相遇过，甲船每时行13千米，乙船每时行多少千米？
<gadget id="calculator">580 - 340</gadget>
<output>240</output>

<gadget id="calculator">240 / 5</gadget>
<output>48</output>

<gadget id="calculator">48 - 13</gadget>
<output>35</output>

<result>35</result>