Mr. Wang was busy with work and didn't go home for 7 days. After returning home, he tore off the calendar for the 7 days. The sum of the date numbers of these 7 days is 119. So what is the day when Mr. Wang goes home?
王老师工作忙，7天没有回家，回家后一次撕下这7天的日历．这7天日期数相加的和是119．那么王老师回家这天是多少号．
<gadget id="calculator">119 / 7</gadget>
<output>17</output>

<gadget id="calculator">17 + 3 + 1</gadget>
<output>21</output>

<result>21</result>