Given two pressure values in Pascals, compute the difference.
400Pa, 800Pa
The difference between the two pressure values in Pascals is 400 Pa.
Complete the following task based on the instruction and optional input provided.### Instruction:
Given two pressure values in Pascals, compute the difference.

### Input:
400Pa, 800Pa

### Output:
The difference between the two pressure values in Pascals is 400 Pa.