title: Does EXP4J handle decimals
body: <p>I have this in my app;</p>
  
  <pre><code>Calculable result= new ExpressionBuilder(s1).build();
              size.setText(Double.toString(result.calculate()));
              size_num = result.calculate();
  </code></pre>
  
  <p>If I enter 100*.25 in S1, it gives me an exception. Without a decimal, it is fine. Is there a workaround where EXP4J can handle decimals?</p>
  
  <p>Also if I enter a tab after my equation, EXP4J can't seem to handle that.  Does anyone know how to handle a tab in the equation before EXP4J is called?  </p>
  
  <p>Thank you!!</p>