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, letâ€™s convert the measurements to the same unit. Since the side length of the squares is given in millimeters, letâ€™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, letâ€™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.