Suppose one egg contains 25 milligrams of calcium, a piece of toast contains 40 milligrams of calcium, and a glass of milk contains 215 milligrams of calcium. how many milligrams of calcium are contained in a breakfast that consists of 2 eggs, 1 glasses of milk, and 4 pieces of toast?
there are milligrams of calcium.?

The breakfast contains 2 eggs, 1 glass of milk and 4 pieces of toast.
It is already given in the question that the amount of calcium contained in 1 egg is 25 milligrams.
So the amount of calcium contained in 2 eggs = (2 * 25) milligrams
                                                                           = 50 milligrams
Amount of calcium in 1 glass of milk is given in the question as 215 milligrams.
Amount of calcium contained in 1 piece of toast is 40 milligrams.
Then the amount of calcium contained in 4 pieces of toast = (4 * 40) milligrams
                                                                                               = 160 milligrams
Then
The total amount of calcium contained in the breakfast = ( 50 + 215 + 160) milligrams
                                                                                         = 425 milligrams.
There are 425 milligrams of calcium.