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The question asks for the area of a rectangular poster in square meters, given its dimensions in centimeters. 

Here's how to solve it:

### Given:
- Length = 15 cm
- Width = 12 cm

### Steps:

1. **Convert dimensions to meters**: Since there are 100 centimeters in 1 meter:
   - Length in meters = \( \frac{15}{100} = 0.15 \) meters
   - Width in meters = \( \frac{12}{100} = 0.12 \) meters

2. **Calculate the area**: The area \( A \) of a rectangle is given by:
   \[
   A = \text{Length} \times \text{Width}
   \]
   Substituting the values:
   \[
   A = 0.15 \times 0.12 = 0.018 \text{ square meters}
   \]

Thus, the area of the poster is **0.018 square meters**.

Let me know if you want further details or clarifications.

### Relative Questions:
1. How do you convert square centimeters to square meters?
2. What is the formula for calculating the area of a rectangle?
3. Why is it important to convert units before performing calculations?
4. How do you calculate areas of irregular shapes?
5. What other types of units can be used to measure area?

### Tip:
Always ensure units are consistent when performing calculations, especially when converting between metric units.

Mary has a rectangular poster that is 15 centimeters long and 12 centimeters wide. What is the area of the poster in square meters? Do not round your answer.

Learn how to find the area of a rectangular poster with dimensions of 15 cm by 12 cm. This problem covers unit conversion from centimeters to meters and basic geometry principles for area calculation. Suitable for Grades 6-8.

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