9km = 9,000,000 (nine million) millimeters.
50km is 50 million millimeters.
9 km = 9 000 metres = 9 000 000 millimetres which is 10 000 times as large as 900 millimetres.
386,000,000 mm
5km is 5,000,000 millimeters.
90 millimeters = 9 centimeters
50 kilometers = 50,000,000 millimeters
2.64 km = 2,640 m = 264,000 cm = 2,640,000 mm
There are .00001 mm in 1 km.
1,000,000 -- 1 million millimeters in 1 km
1/2 km = 500m = 500,000 millimeters
6 km is 6,000,000 millimeters.
To convert km to mm you multiply km by 1,000,000 (one million). So, 1km = 1 million millimeters.