Reagan Trip

BRASILIA, Brazil--President Reagan in Brazil for meetings with this nation's militery president said yesterday the I nited States is lathing with its allies about expanding the multinational peacekeeping force in Lebonon.

Reagan said that could entail using troops from other nations, but sources with the presidental party and in Washington said the American government probably would double the number of U S troops in Lehanon to 2,400 in responce to an appeal from the Beirut government