demo2

hint.txt

Remember, all three children need to be wrapped in their own Expanded widget.

main.dart

import 'package:flutter_web/material.dart';
import 'package:flutter_web_test/flutter_web_test.dart';
import 'package:flutter_web_ui/ui.dart' as ui;

void main() async {
  await ui.webOnlyInitializePlatform();
  
    runApp(MyApp());
  
}

class MyApp extends StatelessWidget {
   @override
    Widget build(BuildContext context) {
      return MaterialApp(
        title: 'Demo2',
          home: Scaffold(
            appBar: AppBar(
              title: Text('Demo2'),
                ),
            body: Center(child: buildExpandedImages()), 
          ),
        );
    
}
  
    Widget buildExpandedImages() =>
      Row(
        crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            Image.network('https://urlzs.com/NDjgv'),
              Image.network('https://urlzs.com/69nj6'),
                Image.network('https://urlzs.com/RsqCz'),
                  ],
                );
        
}

solution.dart

import 'package:flutter_web/material.dart';
import 'package:flutter_web_test/flutter_web_test.dart';
import 'package:flutter_web_ui/ui.dart' as ui;

void main() async {
  await ui.webOnlyInitializePlatform();
  
    runApp(MyApp());
  
}

class MyApp extends StatelessWidget {
   @override
    Widget build(BuildContext context) {
      return MaterialApp(
        title: 'Demo2',
          home: Scaffold(
            appBar: AppBar(
              title: Text('Demo2'),
                ),
            body: Center(child: buildExpandedImages()), 
          ),
        );
    
}
  
    Widget buildExpandedImages() =>
      Row(
        crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            Expanded(
            child: Image.network('https://urlzs.com/NDjgv'),
              ),
              Expanded(
              child: Image.network('https://urlzs.com/69nj6'),
                ),
                Expanded(
                child: Image.network('https://urlzs.com/RsqCz'),
                  ),
                  ],
                );
        
}