title: TypeError: Cannot call method 'toFixed' of undefined, JavaScript Error
body: <p>Im taking an online coding course and I keep getting this error:</p>
  
  <pre><code>Line 18, TypeError: Cannot call method 'toFixed' of undefined
  </code></pre>
  
  <p>Not sure what is going wrong. Here is the full code:</p>
  
  <pre><code>//Calculate the area of a rectangle
  function calculateArea(length, width) {
    return length * width;
  }
  
  function calculateTileCount(tileWidth,length,width)
  {
    var tileArea = tileWidth * tileWidth
    var tileCount = calculateArea(length, width) / tileArea;
  }
  
  var bathroom1 = calculateTileCount(0.3, 5, 3);
  var bathroom2 = calculateTileCount(0.3, 6.5, 3.5);
  var bathroom3 = calculateTileCount(0.45, 9, 4);
  var bathroom4 = calculateTileCount(0.45, 11, 4);
  
  console.log('Bathroom Tiling' +
    '\nBathroom 1: ' + bathroom1.toFixed(0) +
    '\nBathroom 2: ' + bathroom2.toFixed(0) +
    '\nBathroom 3: ' + bathroom3.toFixed(0) +
    '\nBathroom 4: ' + bathroom4.toFixed(0));
  </code></pre>
  
  <p>Any help is much appreciated,
  -Morgan </p>