docker files fixes from liaqat

src/Managing.Core/MathHelpers.cs

@@ -0,0 +1,25 @@
+namespace Managing.Core
+{
+    public static class MathHelpers
+    {
+        public static int GetDecimalPlaces(decimal n)
+        {
+            n = Math.Abs(n); //make sure it is positive.
+            n -= (int)n;     //remove the integer part of the number.
+            var decimalPlaces = 0;
+
+            while (n > 0)
+            {
+                decimalPlaces++;
+                n *= 10;
+                n -= (int)n;
+            }
+            return decimalPlaces;
+        }
+
+        public static int GetDecimalPlaces(string n)
+        {
+            return n.Split('.')[1].Length - 1;
+        }
+    }
+}