Problem: a watch was sold at a loss of 10 % . if it was sold for rs . 140 more , there would have been a gain of 4 % . what is the cost price ?
Rationale: "explanation : 90 % 104 % - - - - - - - - 14 % - - - - 140 100 % - - - - ? = > rs . 1000 a )"
annotated_formula: divide(multiply(140, const_100), subtract(add(const_100, 4), subtract(const_100, 10)))