Six.
10 significant figures.
3 of them.
80.07749999999999
4
3
2.6
It might have been possible to answer the question if the "following" multiplication had followed. But since you did not bother to make sure that it did, I cannot provide a more useful answer.
The least number of significant figures in any number of the problem determines the number of significant figures in the answer.
The least number of significant figures in any number of the problem determines the number of significant figures in the answer which in this case is 656.64
The least number of significant figures in any number of the problem determines the number of significant figures in the answer which in this case is 273.8
The least number of significant figures in any number of the problem determines the number of significant figures in the answer which in this case is 270.8
3 of them.