Add ExpantaNum HTML file with input/output functionality

Author: MakiNishi3

notations/normal/ExpantaNum.html

@@ -0,0 +1,10 @@
+<script src="https://makinishi3.github.io/notations/normal/package/ExpantaNum.js"></script>
+<script src="./ExpantaNum.js"></script>
+<script>
+  function run(){
+    var v=new Decimal(document.getElementById("input").value);
+    document.getElementById("output").innerHTML=notations.normal.ExpantaNum(v);
+  }
+</script>
+<input id="input" value="0" onchange="run()"><br>
+Your number is denotated as: <span id="output">0</span>.