A manuscript has 210 pages, which are printed simultaneously by two printers, A and B. Printer A prints 5 pages per minute and Printer B prints 9 pages per minute. How many minutes will it take to print this manuscript?
一份稿件有210页，由甲乙两台打印机同时打印．甲打印机每分钟打印5页，乙打印机每分钟打印9页．几分钟可打印完这份稿件？
<gadget id="calculator">5 + 9</gadget>
<output>14</output>

<gadget id="calculator">210 / 14</gadget>
<output>15</output>

<result>15</result>