Unsolved puzzle..plz help

Implaying a game on my DS pandora's box, I can't get passed a question. As i cant draw a diagram il do my best to get it across. Four circular flower beds, each with a radius of 10 metres. The way they are arranged forms a space between them. Can u find the area in metre squared, of the bottom flower bed and middle space. looks something like this : O
O O
O
BUT ALL CIRCLES TOUCHING WITH THE DIAMOND SPACE IN THE MIDDLE

Unsolved Puzzle..plz Help

If you go on the internet and google professor layton pandoras box walkthrough it will bring up many sites that will give you the answer to the puzzles