diff --git a/Makefile b/Makefile
index aaad452..bb7fdde 100644
--- a/Makefile
+++ b/Makefile
@@ -37,3 +37,7 @@ update-template-packages:  ## Update the project using the initial copier templa
 .PHONY: clean
 clean: ## Clean the temporary files.
 	rm -rf megalinter-reports
+
+.PHONY: run
+run:  ## Run the application
+	poetry run python {{module_name}}
diff --git a/project_template/{{module_name}}/__main__.py b/project_template/{{module_name}}/__main__.py
new file mode 100644
index 0000000..536fbf5
--- /dev/null
+++ b/project_template/{{module_name}}/__main__.py
@@ -0,0 +1,8 @@
+from calculator import Calculator
+calc = Calculator()
+
+calc.add(5)
+
+calc.subtract(2)
+
+print(calc.cumulative_total)