A school gym is set up for an assembly. There are $$ \Pi $$ rows with 28 chairs in each row Parents are silting in half the chairs, but the ather half are empty How many chains are empty?

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To solve the problem, we need to determine the total number of chairs in the gym and then find out how many of those chairs are empty.

1. **Identify the known conditions:**
   - There are $$ \Pi $$ rows.
   - Each row has 28 chairs.
   - Parents are sitting in half of the chairs.

2. **Calculate the total number of chairs:**
   The total number of chairs can be calculated using the formula:
   $$
   \text{Total Chairs} = \Pi \times 28
   $$

3. **Determine how many chairs are occupied:**
   Since parents are sitting in half of the chairs, the number of occupied chairs is:
   $$
   \text{Occupied Chairs} = \frac{1}{2} \times \text{Total Chairs} = \frac{1}{2} \times (\Pi \times 28)
   $$

4. **Calculate the number of empty chairs:**
   The number of empty chairs can be found by subtracting the number of occupied chairs from the total number of chairs:
   $$
   \text{Empty Chairs} = \text{Total Chairs} - \text{Occupied Chairs}
   $$
   Substituting the expressions we have:
   $$
   \text{Empty Chairs} = (\Pi \times 28) - \left(\frac{1}{2} \times (\Pi \times 28)\right)
   $$

5. **Simplify the expression:**
   $$
   \text{Empty Chairs} = \Pi \times 28 - \frac{1}{2} \times \Pi \times 28 = \frac{1}{2} \times \Pi \times 28
   $$

Thus, the number of empty chairs is:
$$
\text{Empty Chairs} = \frac{1}{2} \times \Pi \times 28
$$

This means that half of the total chairs are empty. If you have a specific value for $$ \Pi $$, you can substitute it in to find the exact number of empty chairs.
There are $$ \frac{1}{2} \times \Pi \times 28 $$ empty chairs.

A school gym is set up for an assembly. There are \( \Pi \) rows with 28 chairs in each row Parents are silting in half the chairs, but the ather half are empty How many chains are empty?

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