How to create a copy of .html files with .txt extension using bat file?

Question

cmd/bat

For example, there is
1.html
2.html
3.html
so that
1.html
1.txt
2.html
2.txt
3.html
3.txt

Answer 1

copy *.html *.txt

Answer 2

forfiles /S /M *.html /C "cmd /c copy @file @fname.txt"