title: My php code not getting add correct
body: <p>I making one counter, I am using PHP and almost everything was going fine but i found one small bug in it. </p>
  
  <p>My first two step on counter is going fine that is <code>$bid</code> and <code>$stax</code>.</p>
  
  <p>My last result <code>$pay</code> should be : <code>8138 + 814 + 448 = 9400</code> but it is giving me <code>$9,399</code></p>
  
  <p><strong>My Output is:</strong> </p>
  
  <pre><code>Value $8,138 bid $814 tax $448 You Pay $9,399
  Value $8,952 bid $895 tax $492 You Pay $10,339
  Value $9,847 bid $985 tax $542 You Pay $11,373
  </code></pre>
  
  <p>Here is my php</p>
  
  <pre><code>&lt;?php
  $i = 0;
  $v = 8138;  // value : 8138
  do {
      $i++;
      $bid  = $v / 10;      // output : $814
      $ftax = $v + $bid;
      $stax = $ftax / 20;  // output : tax $448
      $pay  = $v + $bid + $stax;   // 8138 + 814 + 448 = 9400
      echo "Value $" . number_format($v) . " bid $" . number_format($bid) . " tax $" . number_format($stax) . " You Pay $" . number_format($pay) . "&lt;br /&gt;";
      $v = $v * 1.1;
  } while ($i &lt;= 2);
  ?&gt;
  </code></pre>
  
  <p>Thanks in advance :)</p>