[GRASS-user] how to crop multiple raster files at a same time in mapcalculator GRASS gis

hello…
i want to crop multiple files using mapcalc how to do this in GRASS GIS.

i have MAP: A as base file and B,C,D…as subfiles. how to crop these files in a loop?
pls help me…

for one file its straight forward
mapcalc>out=A*B

if any one have script pls forward it to me…



Bharath S
CES,EWRG,
IISC,
Bangalore.

Ph: 09483832144