Assuming you mean millimetres and kilometres, the answer is one million.
12.7 (rounded)
312 cm
1 meter = 1000 millimeters 7 meters = 7000 millimeters
800 cm
That depends on what the '8' are. 8 feet. . . . . 243.8 cm (rounded) 8 inches. . . . . 20.32 cm (rounded) 8 miles . . . 1,287,475 cm (rounded) 8 millimeters . . . . . 0.8 cm (rounded) 8 smoots . . . . . . 170.2 cm (rounded) 8 furlongs. . . 160,934 cm (rounded) 8 meters. . . . . . . 800 cm (rounded)
8 cm in km would be 0.00008km
100 cm = 1 m ⇒ 8 cm = 8 ÷ 100 m = 0.08 m
8 cm * 8 cm * 8 cm = 512 cm3.8 cm * 8 cm * 8 cm = 512 cm3.8 cm * 8 cm * 8 cm = 512 cm3.8 cm * 8 cm * 8 cm = 512 cm3.
8 cm.8 cm.8 cm.8 cm.
1 m = 100 cm then 8 m = 8 x 100 cm = 800 cm
1 m = 100 cm so 8 m = 800 cm. Simple!