diff --git a/README.md b/README.md
index dac48fe..1887a2d 100644
--- a/README.md
+++ b/README.md
@@ -60,7 +60,7 @@ git checkout -b feature/change-multiply
 3. From feature/refactor-multiply branch, rename "multiply" method to "product" everywhere.
 ```
 git checkout feature/refactor-multiply
-# TODO: rename method "multiply" to "product" in Calculator, BasicCalculator, MathHelper and ReportGenerator
+# TODO: rename method "multiply" to "product" every where(BasicCalculator,ReportGenerator, test class, ...)
 git add .
 git commit -m "refactor: renamed multiply to product"
 git checkout develop
@@ -70,7 +70,7 @@ git merge feature/refactor-multiply
 4. From feature/change-multiply branch, change the body of multiply method
 ```
 git checkout feature/change-multiply
-# TODO: change the body of MathHelper.multiply (e.g., loop-based multiplication)
+# TODO: change the body of Calculator.multiply (e.g., loop-based multiplication)
 git add .
 git commit -m "multiply method body changed"
 git checkout develop
@@ -117,7 +117,7 @@ git merge feature/remove-calculator
 3. From feature/add-method-to-interface add method to deleted interface
 ```
 git checkout feature/add-method-to-interface
-# TODO: add "double calculateArea(double,double)" to Calculator, implement in BasicCalculator
+# TODO: add "double calculateArea(double a,double b)" to Calculator, implement in BasicCalculator
 git add .
 git commit -m "add calculateArea() method"
 git checkout develop
@@ -125,11 +125,8 @@ git merge feature/add-method-to-interface   # CONFLICT
 ```
 
 4. Resolve
-- Keep the `Calculator` interface.
-- Restore the deleted file.
-- Add the new `calculateArea()` method to the interface.
+- Keep the `Calculator` interface with new added `calculateArea()` method.
 ```
-git add .
 git commit -m "resolved: Restored deleted interface and added calculateArea "
 ```