diff --git a/calculator/__init__.py b/calculator/__init__.py
index a89fc5a..74c75f5 100644
--- a/calculator/__init__.py
+++ b/calculator/__init__.py
@@ -1 +1 @@
-from .calcurator import add, subtract, divide, multiply, square_root
\ No newline at end of file
+from .calcurator import add, subtract, divide, multiply, square_root
diff --git a/calculator/calcurator.py b/calculator/calculator.py
similarity index 97%
rename from calculator/calcurator.py
rename to calculator/calculator.py
index e400c62..ea6fa8b 100644
--- a/calculator/calcurator.py
+++ b/calculator/calculator.py
@@ -1,3 +1,5 @@
+import math
+
 def add(x, y):
     """Returns the sum of x and y."""
     return x + y
diff --git a/calculator/tests/__init__.py b/calculator/tests/__init__.py
deleted file mode 100644
index e69de29..0000000