Translation of "300" in Chinese

- The river is 300 kilometers in length.
- That river is 300 kilometers long.

那条河长300公里。

The river is 300 kilometers in length.

那条河长300公里。

I cannot afford a camera above 300 dollars.

我买不起300块美元以上的照相机。

This gun has a range of 300 meters.

这个武器有300米的射程。