0.0000003 cm
The nanometer (symbol nm) is a unit of length, like the centimeter, decimeter, and meter. 1 nanometer =10^(-9) m =10^(-7) cm
This tells us that 3nm=3×10^-7 cm = 0.0000003 cm
A chip nanometer is a unit of length, which in processors refers to the distance between transistors, and the smaller the distance, the more transistors can be integrated into the same size area. The more complex the chip can be, the more advanced, the better the performance, and the lower the power consumption.