diff --git a/app/views/units/index.html.erb b/app/views/units/index.html.erb
index 1dbdfc1..98dc7cc 100644
--- a/app/views/units/index.html.erb
+++ b/app/views/units/index.html.erb
@@ -22,7 +22,7 @@
           <%= link_to unit.symbol, edit_unit_path(unit) %>
         </td>
         <td><%= unit.name %></td>
-        <td class="number"><%= unit.multiplier unless unit.multiplier == 1 %></td>
+        <td class="number"><%= unit.multiplier.to_s('3F') unless unit.multiplier == 1 %></td>
         <% if current_user.at_least(:active) %>
           <td class="actions">
             <%= image_button_to t(".delete_unit"), "delete-outline", unit_path(unit),
diff --git a/config/initializers/core_ext.rb b/config/initializers/core_ext.rb
deleted file mode 100644
index 5feeadb..0000000
--- a/config/initializers/core_ext.rb
+++ /dev/null
@@ -1 +0,0 @@
-require 'core_ext/big_decimal/formatting'
diff --git a/lib/core_ext/big_decimal/formatting.rb b/lib/core_ext/big_decimal/formatting.rb
deleted file mode 100644
index e0c9d95..0000000
--- a/lib/core_ext/big_decimal/formatting.rb
+++ /dev/null
@@ -1,12 +0,0 @@
-#require "bigdecimal"
-#require "bigdecimal/util"
-
-module FixinMe
-  module BigDecimalWithGrouping
-    def to_s(format = "3F")
-      super(format)
-    end
-  end
-end
-
-BigDecimal.prepend(FixinMe::BigDecimalWithGrouping)