diff --git a/maths/weddles_rule.py b/maths/weddles_rule.py
index da41f82ec..0c26a499d 100644
--- a/maths/weddles_rule.py
+++ b/maths/weddles_rule.py
@@ -146,4 +146,4 @@ if __name__ == "__main__":
         solution = compute_solution(add, table, h)
         acc *= 10
 
-    print(f'Solution: {solution}')
+    print(f"Solution: {solution}")