25.4
7 " = 177.8 mm
0.94
One inch is equal to 25.4 millimetres. Therefore, rounded to two decimal places, 400 millimetres is equal to 400 / 25.4 = 15.75 inches.
One inch is equal to 25.4 millimetres. Therefore, 577 millimetres is equal to 577/25.4 millimetres. Rounded to two decimal places, this is equal to 22.72 inches.