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Python code to 3 rounding or floats.
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Here is a Python code to 3 rounding or floats

import math

def round_to_3_decimals(number):
    """Round a number to 3 decimals."""
    return round(number, 3)

# Enter the number
number = 1234567890123456789012345678901234567890

# Calling the function
print((round_to_3_decimals(number)))

#Example Output
# 1234567890123456789012345678901234567890

#Remember to inspect code for bugs.