A survey reported that $33 \frac{1}{3} \%$ of 1800 employees favored a new insurance program. How many employees favored the new program? The new program was favored by $\square$ employees.

Step 1 ：The question is asking for the number of employees who favored the new insurance program. This can be calculated by finding $33 \frac{1}{3} \%$ of 1800. To do this, we need to convert the percentage to a decimal and then multiply it by the total number of employees.

Step 2 ：First, convert the percentage to a decimal: $33 \frac{1}{3} \% = 0.3333$

Step 3 ：Next, multiply the decimal by the total number of employees: $0.3333 \times 1800 = 599.94$

Step 4 ：However, since we cannot have a fraction of an employee, we need to round this number to the nearest whole number: $599.94$ rounds to $600$

Step 5 ：Final Answer: The new program was favored by $\boxed{600}$ employees.