diff --git a/t13_areaofsphere1.py b/t13_areaofsphere1.py
new file mode 100644
index 0000000..1e1015f
--- /dev/null
+++ b/t13_areaofsphere1.py
@@ -0,0 +1,6 @@
+pi = 3.14159
+diameter = float(input("Enter the diameter of the sphere: "))
+radius = diameter/2
+
+area_of_sphere = (4/3)*pi*(radius**3)
+print(area_of_sphere)