Answer:
Here's a simple Python program that calculates the volume of a cube:
```
# Get the length of the cube from the user
length = float(input("Enter the length of the cube: "))
# Calculate the volume of the cube
volume = length ** 3
# Print the volume of the cube
print("The volume of the cube is", volume)
```
In this program, we first get the length of the cube from the user using the `input()` function. We then use the formula for the volume of a cube, which is `length ** 3`, to calculate the volume. Finally, we print the volume of the cube using the `print()` function.