//
// For input that looks like the following (give a command line that 
// specifies the input file will contain Rationals)
//

ADD 1/2  -3/4
MULT   -86123 / 92734    -982934 / 123123

//
// The output might look like the following.  Note that all commands are
// echoed.
//

ADD 1/2 -3/4
Result: -2/8

MULT -86123/92734 -982934/123123
Result: 84653224882/11417688282