You wrote "string" in the title and your question includes a quoted string but still, asking for "int" makes me wonder if you really meant that you're looking for integers. Seems unlikely, but here's a solution, just in case:

s/(\d+)/$1 $1 $1/g;

In reply to Re: replace a string multiple times by igelkott
in thread replace a string multiple times by amar712

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