diff --git a/curriculum/challenges/english/07-scientific-computing-with-python/learn-interfaces-by-building-an-equation-solver/662f96576ef178927de87975.md b/curriculum/challenges/english/07-scientific-computing-with-python/learn-interfaces-by-building-an-equation-solver/662f96576ef178927de87975.md
index dd06ade6f6c..fc495352ac7 100644
--- a/curriculum/challenges/english/07-scientific-computing-with-python/learn-interfaces-by-building-an-equation-solver/662f96576ef178927de87975.md
+++ b/curriculum/challenges/english/07-scientific-computing-with-python/learn-interfaces-by-building-an-equation-solver/662f96576ef178927de87975.md
@@ -9,6 +9,14 @@ dashedName: step-7
 
 In order to be recognized as an abstract method, a method should be decorated with the `@abstractmethod` decorator.
 
+A <dfn>decorator</dfn> is used in Python to modify the behavior of a function. Here's an example of how to use a decorator named `spam`:
+
+```py
+@spam
+def foo():
+    pass
+```
+
 Modify your import statement to import the `abstractmethod` decorator and decorate both the `solve` and `analyze` methods of the `Equation` class. This will raise two exceptions.
 
 Once a class inheriting from `ABC` has an abstract method, the class cannot be instantiated anymore. Therefore, delete the `Equation` instance to get rid of the error.