Sudoku #978

Complexity: Easy

 Fun Fact About Sudoku
The oldest known puzzle is a dissection of a square mentioned by Archimedes around 250BC.

Enter numbers into the empty cells so that each row, column and 3x3 box contains the numbers 1 to 9.

6 4 8 2 7 9 1
7 5 4 2
2 1 3 5 7
9 4 6 5 8 7
7 1 6
5 1 9 7 2 4
8 2 4 7 5
6 5 4 2
7 9 5 3 8 6 1