304.8 mm
50 mm = 0.164 feet
5000 mm = 16.4 feet
970 mm = 3.18 feet
121 mm is 0.396982 feet.
12 feet is 3,657.6 mm
1690 mm is 5.544619 feet.
2,750 mm
1100 mm = 3.6089239 feet
160 mm is about .5249 feet
2340 mm = 7.68 feet
2340 mm is about 7.7 (7.677165) feet.