title: binary operator * cannot be applied to operands of type Int and Double
body: <p>I'm trying to build a simple Swift app to calculate VAT (Value Added taxes = 20%).</p>
  
  <pre><code>func taxesFree(number: Int) -&gt; Double {
  
      var textfield = self.inputTextField.text.toInt()!
      let VAT = 0.2
      var result = textfield * VAT
  
      return result        
  }
  </code></pre>
  
  <p>For some reason I keep getting </p>
  
  <blockquote>
    <p>Binary operator * cannot be applied to operands of type Int and Double </p>
  </blockquote>
  
  <p>on the line </p>
  
  <pre><code>var result = textfield * VAT    
  </code></pre>