随风

也来一个
:

@echo off&setlocal EnableDelayedExpansion
for /l %%a in (0 1 9) do set .%%a=%%a
for /f "delims=" %%a in (a.txt) do (
   set flag=&set num=&set sun=&set "str=%%a"
   call :loop
)
pause
:loop
set "var=!str:~-1!"
if defined .!var! (set num=!var!!num!&set flag=a) else (set sun=!var!!sun!&set flag=)
if not defined num set str=!str:~0,-1!&goto loop
if defined flag set str=!str:~0,-1!&goto loop
set /a num*=7
echo !str!!num!!sun:~1!
goto:eof
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