9. Add a positive integer to 2013 so that the sum is divisible by 11 and 13, and the added integer is as small as possible. The positive integer to be added is $\qquad$.
【Analysis】 $[11,13]=143$, which can be divided by 11 and 13, i.e., it can be divided by 143. $2013 \div 143=14 \cdots 11$, so the smallest number that needs to be added is $143-11=132$.
Or, the smallest multiple of 143 greater than 2013 is $143 \times 15=2145$, so the smallest number that needs to be added is $2145-2013=132$.