Two ships set off from two places 425 kilometers apart at the same time and travel towards each other. Ship A travels 35 kilometers per hour, and ship B travels 50 kilometers per hour. How many kilometers are there between them after 6 hours?
两艘轮船从相距425千米的两地同时出发，相向而行甲船每小时行35千米，乙船每小时行50千米，6小时后它们相距多少千米
<gadget id="calculator">35 + 50</gadget>
<output>85</output>

<gadget id="calculator">85 * 6</gadget>
<output>510</output>

<gadget id="calculator">510 - 425</gadget>
<output>85</output>

<result>85</result>