PROGRAMMING:Triangle area

Given the length and angle of the two sides of a triangle, the area of the triangle is calculated
###Input format:
Input the length a, B and angle c of the two sides of the triangle respectively (where 0 < A, B < 60, 0 < C < 180)
###Output format:
Output the area of the triangle (keep the area to 3 decimal places)
###Input example:
```in
3 4 90
28 24 42
```
###Output example:
```out
six
two hundred and twenty-four point eight two eight
```







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