diff --git a/prometheus.py b/prometheus.py
new file mode 100644
index 0000000000..96feffd99c
--- /dev/null
+++ b/prometheus.py
@@ -0,0 +1,16 @@
+ def calculate_sum(my_list: list[int]) -> int:
+    """
+    Calculates the sum of a list of integers, where each number is multiplied by its index.
+
+    Args:
+        my_list (list[int]): The input list of integers.
+
+    Returns:
+        int: The sum of the integers in the list, where each number is multiplied by its index.
+
+    Raises:
+        TypeError: If the input is not a list.
+
+    Examples:
+        >>> calculate_sum([1, 2, 3, 4])
+        30