A task of producing Chinese patent medicines is evenly divided between workshops A and B. Workshop A completes the task in 4 days, while workshop B produces 4 days and still has 60 cases left unfinished. The ratio of work efficiency between workshops A and B is known. If it is 6:5, how many boxes of this batch of Chinese patent medicines are there?
把一项生产中成药的任务平均分给甲、乙两个车间，甲车间4天完成任务，乙车间生产了4天还剩60箱没有完成，已知甲、乙两个车间工作效率的比是6：5，则这批中成药共有多少箱？
<gadget id="calculator">6 * 15 * 4</gadget>
<output>360</output>

<gadget id="calculator">360 * 2</gadget>
<output>720</output>

<result>720</result>