11. In the Kingdom of Fantasy, the way of representing numbers is quite unique. If a number or a part of a number consists of consecutive digits, it must be written in another form. For example, what we write as 12345, they must write as $1 ※ 5$; what we write as 134569, they must write as $13 ※ 69$; what we write as 7543210, they must write as $75 ※ 0$. Of course, there are also troublesome times, such as 98, which they must write as $9 ※ 8$. The following calculation problem is a math question from the Kingdom of Fantasy. Please calculate the correct result (expressed in the normal way).
$$
20 ※ 13 + 20 ※ 3 + 2 ※ 0 ※ 13 =
$$
$\qquad$
Answer: 43149