how to take a certain number of characters:

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Lev Mihailov
Lev Mihailov 2020-1-31
编辑： Bhaskar R 2020-1-31
Hello! I have the number 9928900200, I need to do 992890,0200, how can I get this?

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Bhaskar R
Bhaskar R 2020-1-31
编辑：Bhaskar R 2020-1-31
num_str = num2str(9928900200);
first_part = num_str(1:6);
second_part = num_str(7:end);
num = strcat(first_part, ',', second_part);

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