PROGRAMMING:Calculate the area of a circle
Input the radius of the circle, program its area and output.
Note: Pi is 3.1415926
###Input format:
Enter the radius of the circle.
###Output format:
The area of the output circle.
###Input example:
```in
seven hundred and seventy-seven
```
###Output example:
```out
one million eight hundred and ninety-six thousand six hundred and seventy point five zero zero zero zero zero
```
answer：If there is no answer, please comment
Note: Pi is 3.1415926
###Input format:
Enter the radius of the circle.
###Output format:
The area of the output circle.
###Input example:
```in
seven hundred and seventy-seven
```
###Output example:
```out
one million eight hundred and ninety-six thousand six hundred and seventy point five zero zero zero zero zero
```
answer：If there is no answer, please comment