diff --git a/project_euler/problem_56/sol1.py b/project_euler/problem_56/sol1.py
index 98094ea8e..8eaa6e553 100644
--- a/project_euler/problem_56/sol1.py
+++ b/project_euler/problem_56/sol1.py
@@ -1,17 +1,29 @@
-def maximum_digital_sum(a: int, b: int) -> int:
+"""
+Project Euler Problem 56: https://projecteuler.net/problem=56
+
+A googol (10^100) is a massive number: one followed by one-hundred zeros;
+100^100 is almost unimaginably large: one followed by two-hundred zeros.
+Despite their size, the sum of the digits in each number is only 1.
+
+Considering natural numbers of the form, ab, where a, b < 100,
+what is the maximum digital sum?
+"""
+
+
+def solution(a: int = 100, b: int = 100) -> int:
     """
     Considering natural numbers of the form, a**b, where a, b < 100,
     what is the maximum digital sum?
     :param a:
     :param b:
     :return:
-    >>> maximum_digital_sum(10,10)
+    >>> solution(10,10)
     45
 
-    >>> maximum_digital_sum(100,100)
+    >>> solution(100,100)
     972
 
-    >>> maximum_digital_sum(100,200)
+    >>> solution(100,200)
     1872
     """