Master Li and Master Zhang made a total of 176 parts in the same time. Master Li made 7 parts per minute, and Master Zhang made 9 parts per minute. How many minutes did they make?
李师傅和张师傅在同样的时间内共做了176个零件，李师傅每分钟做7个，张师傅每分钟做9个，他们做了几分钟？
<gadget id="calculator">7 + 9</gadget>
<output>16</output>

<gadget id="calculator">176 / 16</gadget>
<output>11</output>

<result>11</result>