Change helper into BigDecimal method

lib/core_ext/big_decimal/formatting.rb

@@ -8,6 +8,28 @@ module FixinMe
         (coefficient.length > 1 ? coefficient.insert(1, '.') : coefficient) +
         (exponent != 1 ? "e#{exponent-1}" : '')
     end
+
+    # Converts value to HTML formatted scientific notation
+    def to_html
+      sign, coefficient, base, exponent = split
+      return 'NaN' unless sign
+
+      result = (sign == -1 ? '-' : '')
+      unless coefficient == '1' && sign == 1
+        if coefficient.length > 1
+          result += coefficient.insert(1, '.')
+        elsif
+          result += coefficient
+        end
+        if exponent != 1
+          result += "×"
+        end
+      end
+      if exponent != 1
+        result += "10<sup>% d</sup>" % [exponent-1]
+      end
+      result.html_safe
+    end
   end
 end