It is known that a + B = 380, if a expands three times, then the product is (); if B shrinks one-half, then the product is ()

It is known that a + B = 380, if a expands three times, then the product is (); if B shrinks one-half, then the product is ()

It is known that a + B = 380, if a is expanded three times, then the product is (1140); if B is reduced by one-half, then the product is (190)