calculate a+b or a*b instantly on the command line or in a batch file with sfk calc for Windows, Mac OS X and Linux.

sfk calc "1+2*3"
do a simple calculation with mathematical
operators + - * /
options
-dig[its]=n round result to n digits
-form also print the formula,
tab separated after result
chaining support
can use chain input data as #text within formula.
web referencehttp://stahlworks.com/sfk-calcexamplessfk calc "1.0+2.5*3.5"
prints 9.75. quotes "" are required
with linux but not under windows.
sfk echo "1+2*3" +calc "#text*4"
calculates 1 + 2*3*4 = 25
sfk echo "1+2*3" +calc "#text" +calc "#text*4"
calculates (1+2*3) * 4 = 28
sfk filt in.txt +calc "#text" -form
calculate all formulas given in in.txt
sfk list -size -tabform sfk.exe +filt -utabform "#col1"+calc "#text/1000" -dig=0
show the size of sfk.exe in kbytes, rounded to
zero digits after decimal point. [29]