Question

how does Decius Brutus interpret calpurnia's dream?

Answer 1

he said that the people will wash their hands in the noble blood of urs.....

Answer 2

He said that the dream was a Fortunate and fair vision and that they have misinterpreted the dream .
His statue that had holes in it and was spouting blood in many pipes in which many Romans bathed signifies that from Caesar's spirit the great Romans would get influenced.
And the great men shall gather around Caesar and stain their handkerchiefs in his blood which will serve as colours added to a coat of arms , an object of reverence , mementos and badge of service .