Adding 5 to the year number of the year Zhang was born is a multiple of 9; adding 6 to it is a multiple of 10; adding 7 to it is a multiple of 11; adding 8 to it is a multiple of 12. So how many years was Xiao Zhang born (Xiao Zhang was born in the 20th century).
小张出生那年的年号加5，就是9的倍数；用它加6，就是10的倍数；用它加7，就是11的倍数；而用它加8，就是12的倍数了．那么小张是在多少年出生的(小张出生在20世纪)．
<gadget id="calculator">3 * 2 * 3 * 11 * 5 * 2</gadget>
<output>1_980</output>

<gadget id="calculator">1_980 + 4</gadget>
<output>1_984</output>

<result>1_984</result>