How do I calculate the division of fixed point numbers

[chencang]

When I encountered some problems in solving the calculation of fixed point numbers, such as the following scenario:
I need to calculate the value of X, but I am not sure how to use this API. I have referenced this Q&A, but my scenario is a division

  ExprEvaluator util = new ExprEvaluator();
  IExpr exp = util.eval("Solve(0==x*22337054158777049688231864282686423040-10270475816355389090971698343895989333566423039,x)");
  //output {{x->3423491938785129696990566114631996444522141013/7445684719592349896077288094228807680}}
  System.out.println(exp.toString());

i expect the x value is 459795446.66066396
how should i write this code.

#294

[axkr]

You can use NSolve to get the numeric result.

See:

• https://github.com/axkr/symja_android_library/blob/master/symja_android_library/doc/functions/NSolve.md
• https://github.com/axkr/symja_android_library/blob/master/symja_android_library/doc/functions/Solve.md
• https://github.com/axkr/symja_android_library/blob/master/symja_android_library/doc/functions/N.md

import org.matheclipse.core.eval.ExprEvaluator;
import org.matheclipse.core.interfaces.IExpr;
import org.matheclipse.parser.client.SyntaxError;
import org.matheclipse.parser.client.math.MathException;

public class GithubIssue838 {
  public static void main(String[] args) {
    try {
      ExprEvaluator util = new ExprEvaluator();
      IExpr exp = util.eval(
          "Solve(0==x*22337054158777049688231864282686423040-10270475816355389090971698343895989333566423039,x)");
      // output
      // {{x->3423491938785129696990566114631996444522141013/7445684719592349896077288094228807680}}
      System.out.println(exp.toString());
      exp = util.eval(
          "NSolve(0==x*22337054158777049688231864282686423040-10270475816355389090971698343895989333566423039,x)");
      // output
      // {{x->4.597954476606639E8}}
      System.out.println(exp.toString());
    } catch (SyntaxError e) {
      System.out.println(e.getMessage());
    } catch (MathException me) {
      System.out.println(me.getMessage());
    } catch (Exception e) {
      e.printStackTrace();
    } catch (final StackOverflowError soe) {
      System.out.println(soe.getMessage());
    } catch (final OutOfMemoryError oome) {
      System.out.println(oome.getMessage());
    }
  }
}

[chencang]

it works,thank you!