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[awk] convert K, M, G to byte in string

p1 file
1.2G /home/parkmo
0.5M /home/parkmo/tmp
------------------------------------------
Output
1288490188 /home/parkmo
524288 /home/parkmo/tmp
------------------------------------------

---- the script -----
cat p1 | awk '{ TEXT1=$1; TEXT2=$2;
 SEP=substr(TEXT1, length(TEXT1), length(TEXT1));
 STR_VALUE=substr(TEXT1, 0, length(TEXT1-1));
# print SEP;
# print STR_VALUE;
 if ( SEP == "K" )
 { VALUE=STR_VALUE*1024 }
 else if ( SEP == "G")
 { VALUE=STR_VALUE*1024*1024*1024 }
 else if ( SEP == "M")
 { VALUE=STR_VALUE*1024*1024 }
 else { VALUE=STR_VALUE }
printf("%d %s\n", VALUE, TEXT2) } '
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