To convert millimeters to meters, you can use the conversion factor that 1 meter equals 1000 millimeters.
To convert 0.521 mm to meters:
\[ 0.521 , \text{mm} \times \frac{1 , \text{m}}{1000 , \text{mm}} = 0.000521 , \text{m} \]
So, 0.521 mm is equal to 0.000521 meters.