Java JEXL String to Math

JexlEngine engine = new JexlEngine();
String rule = "A+B+C*(3*2)-4";
Expression expression = engine.createExpression(rule);
MapContext context = new MapContext();
context.set("A", 978);
context.set("B", 508);
context.set("C", 444);
float number = Float.parseFloat(expression.evaluate(context).toString());
Log.i("Math to String", number + "");

Output:
4146.0