diff --git a/book-src/07-02-shared-data.md b/book-src/07-02-shared-data.md
index 965e842..5c96680 100644
--- a/book-src/07-02-shared-data.md
+++ b/book-src/07-02-shared-data.md
@@ -5,6 +5,6 @@ When we want to mutate data shared between threads, [`Mutex`](**Mut**ually **ex*
 ```zig
 {{#include ../src/07-02.zig}}
 ```
-If we remove Mutex protection, the result will most like be less than 300.
+If we remove Mutex protection, the result will most like be less than 30,000.
 
 [`Mutex`]: https://ziglang.org/documentation/0.11.0/std/#A;std:Thread.Mutex
diff --git a/src/07-02.zig b/src/07-02.zig
index 652cd44..171b3b7 100644
--- a/src/07-02.zig
+++ b/src/07-02.zig
@@ -11,7 +11,7 @@ const SharedData = struct {
         self.mutex.lock();
         defer self.mutex.unlock();
 
-        for (0..100) |_| {
+        for (0..10000) |_| {
             self.value += increment;
         }
     }
@@ -26,5 +26,5 @@ pub fn main() !void {
         const t2 = try Thread.spawn(.{}, SharedData.updateValue, .{ &shared_data, 2 });
         defer t2.join();
     }
-    try std.testing.expectEqual(shared_data.value, 300);
+    try std.testing.expectEqual(shared_data.value, 30_000);
 }