1 inch = 25.4 millimeters, so 15 in = 15 x 25.4 mm = 381 mm
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3 inches is 76.2 millimeters.
145 millimeters = 5.70866142 inches
85 millimeters is equal to 3.3464567 inches.
a meter is 39.375 inches
One inch is 25.4 millimeters, so 57 inches is 1447.8 millimeters.