PROGRAMMING:[expression] [mass calculation a --]
Now there is a cuboid material. We already know its length a m, width b m, height h m and density p kg / m3. Please calculate the mass of this cuboid (kg).
###Input format:
Input a, B, h and P, space separated, data to ensure that each input number does not exceed 100.
###Output format:
Output the mass (kg) of the cuboid material. After the output data, you need to output the carriage return line feed.
###Input example:
Here is a set of inputs. For example:
```in
3 4 5 10
```
###Output example:
The corresponding output is given here. For example:
```out
six hundred
```
answer：If there is no answer, please comment
###Input format:
Input a, B, h and P, space separated, data to ensure that each input number does not exceed 100.
###Output format:
Output the mass (kg) of the cuboid material. After the output data, you need to output the carriage return line feed.
###Input example:
Here is a set of inputs. For example:
```in
3 4 5 10
```
###Output example:
The corresponding output is given here. For example:
```out
six hundred
```
answer：If there is no answer, please comment