diff --git a/solution/3100-3199/3153.Sum of Digit Differences of All Pairs/README.md b/solution/3100-3199/3153.Sum of Digit Differences of All Pairs/README.md
index eb8b072ee284f..0146db4cca987 100644
--- a/solution/3100-3199/3153.Sum of Digit Differences of All Pairs/README.md	
+++ b/solution/3100-3199/3153.Sum of Digit Differences of All Pairs/README.md	
@@ -143,7 +143,7 @@ public:
                 nums[i] /= 10;
             }
             for (int i = 0; i < 10; ++i) {
-                ans += 1LL * (cnt[i] * (n - cnt[i]));
+                ans += 1LL * cnt[i] * (n - cnt[i]);
             }
         }
         return ans / 2;
diff --git a/solution/3100-3199/3153.Sum of Digit Differences of All Pairs/README_EN.md b/solution/3100-3199/3153.Sum of Digit Differences of All Pairs/README_EN.md
index d26d68ffdbc6f..01de7a1d313b8 100644
--- a/solution/3100-3199/3153.Sum of Digit Differences of All Pairs/README_EN.md	
+++ b/solution/3100-3199/3153.Sum of Digit Differences of All Pairs/README_EN.md	
@@ -141,7 +141,7 @@ public:
                 nums[i] /= 10;
             }
             for (int i = 0; i < 10; ++i) {
-                ans += 1LL * (cnt[i] * (n - cnt[i]));
+                ans += 1LL * cnt[i] * (n - cnt[i]);
             }
         }
         return ans / 2;
diff --git a/solution/3100-3199/3153.Sum of Digit Differences of All Pairs/Solution.cpp b/solution/3100-3199/3153.Sum of Digit Differences of All Pairs/Solution.cpp
index 99bb7c4a65a61..516c9f1647450 100644
--- a/solution/3100-3199/3153.Sum of Digit Differences of All Pairs/Solution.cpp	
+++ b/solution/3100-3199/3153.Sum of Digit Differences of All Pairs/Solution.cpp	
@@ -12,9 +12,9 @@ class Solution {
                 nums[i] /= 10;
             }
             for (int i = 0; i < 10; ++i) {
-                ans += 1LL * (cnt[i] * (n - cnt[i]));
+                ans += 1LL * cnt[i] * (n - cnt[i]);
             }
         }
         return ans / 2;
     }
-};
\ No newline at end of file
+};