Evaluate expression in Java using rhino (Javascript)

// Inside Gradle Scripts -> dependencies
implementation 'com.faendir.rhino:rhino-android:1.5.2'

// Equal method
btnEqual.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        String text = input.getText().toString();

        if ("".equals(text)) {
            startPar = false;
            return;
        }

        output.setText(text);

        text = text.replaceAll("÷", "/");
        text = text.replaceAll("%", "/100");
        text = text.replaceAll("×", "*");
        text = text.replaceAll("−", "-");
        text = text.replaceAll("Mod", "%");

        org.mozilla.javascript.Context rhino = Context.enter();

        rhino.setOptimizationLevel(-1);


        String result = "";

        try {
            Scriptable scriptable = rhino.initStandardObjects();
            result = rhino.evaluateString(scriptable, text, "javascript", 1, null).toString();
        }
        catch (Exception e) {
            result = "0";
        }

        if (result.length() > 10) {
            input.setTextSize(TypedValue.COMPLEX_UNIT_SP, 37);
        }

        input.setText(result);
        startPar = false;
    }
});