PROGRAMMING:Computational geometry
Bear_ 2 because of proficient in various algorithms, so often have fans to consult bear_ 2. On this day, another girl came to ask questions. This is a question about computational geometry, bear_ I think it's very simple, and soon I will teach my fans. Bear_ Now I want to know if you can solve the problem. Given a parallelepiped in a three-dimensional coordinate system, can you calculate its volume?
###Input format:
The input is divided into 4 lines, and each line gives a vertex coordinate (x, y, z) of the parallelepiped (- 1000 < = x, y, Z < = 1000). Ensure that the four input points are not coplanar.
###Output format:
Outputs the volume of the parallelepiped with three decimal places.
###Input example:
Here is a set of inputs. For example:
```in
0 0 0
2 0 0
0 2 0
2 0 1
```
###Output example:
The corresponding output is given here. For example:
```out
four
```
answer：If there is no answer, please comment
###Input format:
The input is divided into 4 lines, and each line gives a vertex coordinate (x, y, z) of the parallelepiped (- 1000 < = x, y, Z < = 1000). Ensure that the four input points are not coplanar.
###Output format:
Outputs the volume of the parallelepiped with three decimal places.
###Input example:
Here is a set of inputs. For example:
```in
0 0 0
2 0 0
0 2 0
2 0 1
```
###Output example:
The corresponding output is given here. For example:
```out
four
```
answer：If there is no answer, please comment