Rank the following books within the given genres according to the number of Amazon ratings. Output the ranking in ascending order.
Genre: Fantasy
Book 1: Harry Potter - 12000000 ratings
Book 2: Lord of the Rings - 3000000 ratings
Book 3: The Hobbit - 3500000 ratings
Fantasy book rankings according to the number of Amazon ratings:

1. Harry Potter - 12000000 ratings
2. The Hobbit - 3500000 ratings
3. Lord of the Rings - 3000000 ratings
Complete the following task based on the instruction and optional input provided.### Instruction:
Rank the following books within the given genres according to the number of Amazon ratings. Output the ranking in ascending order.

### Input:
Genre: Fantasy
Book 1: Harry Potter - 12000000 ratings
Book 2: Lord of the Rings - 3000000 ratings
Book 3: The Hobbit - 3500000 ratings

### Output:
Fantasy book rankings according to the number of Amazon ratings:

1. Harry Potter - 12000000 ratings
2. The Hobbit - 3500000 ratings
3. Lord of the Rings - 3000000 ratings