diff --git a/index.html b/index.html
index 203940b..cc2bb1f 100644
--- a/index.html
+++ b/index.html
@@ -219,7 +219,7 @@ li span{float:right;margin-right:10px;color:#c0c0c0}
         The library is incorporated into this page, so it should be available in the console now.
       </i>
     </p>
-    
+
     <h2>API</h2>
 
     <p>
@@ -2633,6 +2633,9 @@ try {
       about <code>25</code> digits more than the precision required.
     </p>
     <p>The value can also be shortened to reduce the size of the source file.</p>
+    <p>To get the value of pi:</p>
+    <pre>
+pi = Decimal.acos(-1)</pre>
 
 
 
@@ -2684,10 +2687,11 @@ z = x.multiply(y)                 // 4.1400000</pre>
       <code>toPrecision</code> methods enable trailing zeros to be added if and when required.<br />
     </p>
   </div>
-  
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