[USER (data scientist)]: What is the distribution of property prices in Flemington, Australia? Show me histogram plot of property prices to visualize the distribution. Please generate a box plot visualization to display the distribution of land sizes ('Landsize') for the Flemington area in the Melbourne housing dataset, and calculate the average land size, saving both the plot as a PNG file and the average land size as a pickle file.

My template of code snippet is:

---BEGIN CODE TEMPLATE---

import matplotlib.pyplot as plt
import pandas as pd
import pickle
import numpy as np

melbourne_housing = pd.read_csv("melb_data.csv")

# YOUR SOLUTION BEGIN:
<code1>
[GENERATE YOUR CODE]
</code1>
# YOUR SOLUTION END:

plt.savefig('./pred_result/box_chart.png')
plt.show()

print(f"Average land size in Flemington, Australia: {average_land_size:.2f} square meters")

# save data
pickle.dump(average_land_size,open("./pred_result/average_land_size.pkl","wb"))

---END CODE TEMPLATE---

[YOU (AI assistant)]: Sure, I can help you with that.
