PROGRAMMING:Find the sum of factorials from 1 to 6
Find the sum of the factorials from 1 to 6.
###Output format:
Output in the order of "Jiecheng = result" in one line. The result is a real number with 6 decimal places and no other additional format.
###Output example:
```out
jiecheng=873.000000
```
answer：If there is no answer, please comment
###Output format:
Output in the order of "Jiecheng = result" in one line. The result is a real number with 6 decimal places and no other additional format.
###Output example:
```out
jiecheng=873.000000
```
answer：If there is no answer, please comment