diff --git a/project/ui/calculation.slint b/project/ui/calculation.slint
index b960a6f..b99c06d 100644
--- a/project/ui/calculation.slint
+++ b/project/ui/calculation.slint
@@ -1,11 +1,14 @@
 import { VerticalBox, Button, Palette } from "std-widgets.slint";
+import { CalendarGrid } from "calendar.slint";
 
 export component Calculation inherits PopupWindow {
-    width: 400px;
-    height: 200px;
+    width: 500px;
+    height: 350px;
     close-policy: PopupClosePolicy.no-auto-close;
 
-    in property <string> message: "EXAMPLE MESSAGE";
+    in property <string> message;
+    in property <int> start;
+    in property <int> end;
 
     Rectangle {
         height: 100%;
@@ -16,6 +19,11 @@ export component Calculation inherits PopupWindow {
     }
 
     VerticalBox {
+        CalendarGrid {
+            start: start;
+            end: end;
+        }
+
         Text {
             text: message;
             font-size: 1.5rem;