There are three employees in a gas station. Starting from January 1 this year, the first employee has one day off every 3 days, the second employee has two days off every 5 days, and the third employee has three days off every 7 days. When all three people take a break, two temporary workers must be hired; when two people take a break, another temporary worker must be hired, but when only one person takes a break, another temporary worker is not required. May I ask the total number of temporary workers to be hired this year?
某加油站有三位员工，从今年1月1日起规定：第一位员工每工作3天休息一天，第二位员工每工作5天休息二天，第三位员工每工作7天休息三天．当三人都休息时，必须另聘二位临时工；当有二人休息时，必须另聘一位临时工，但只有一人休息时，则不须另聘临时工．请问今年共须聘请临时工多少人次？
<gadget id="calculator">25 + 25 + 19</gadget>
<output>69</output>

<gadget id="calculator">69 * 1</gadget>
<output>69</output>

<gadget id="calculator">11 * 2</gadget>
<output>22</output>

<gadget id="calculator">69 + 22</gadget>
<output>91</output>

<result>91</result>