To find the number of squares that will be cut, we need to find the number of squares that can fit in the metal plate.

First, let’s convert the measurements to the same unit. Since the side length of the squares is given in millimeters, let’s convert the measurements of the metal plate to millimeters as well.

42 cm = 42 * 10 mm = 420 mm 14 cm = 14 * 10 mm = 140 mm

Now, let’s find the number of squares that can fit in the length and width of the metal plate.

Number of squares in the length = 420 mm / 7 mm = 60 squares Number of squares in the width = 140 mm / 7 mm = 20 squares

To find the total number of squares, we multiply the number of squares in the length by the number of squares in the width.

Total number of squares = 60 squares * 20 squares = 1200 squares

Therefore, 1200 squares will be cut from the metal plate.