Update Day 7.md

Author: darkprinx

Status/Day 7.md

@@ -4,6 +4,19 @@
 
 > **_Define a class with a generator which can iterate the numbers, which are divisible by 7, between a given range 0 and n._**
 
+> **_Suppose the following input is supplied to the program:_**
+
+```
+7
+```
+
+> **_Then, the output should be:_**
+
+```
+0
+7
+14
+```
 ---
 
 ### Hints: