1.8 m of cloth is required for a shirt. How many such shirts can be made from a piece of cloth 45 m long?

Answer

To solve the problem of how many shirts can be made from 45 meters of cloth when each shirt requires 1.8 meters, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the amount of cloth needed for one shirt**:
We know that 1 shirt requires 1.8 meters of cloth.

2. **Determine the total length of cloth available**:
We have a total of 45 meters of cloth.

3. **Set up the division to find the number of shirts**:
To find out how many shirts can be made, we divide the total length of cloth by the amount needed for one shirt.
\[ \text{Number of shirts} = \frac{\text{Total cloth}}{\text{Cloth per shirt}} = \frac{45 \text{ m}}{1.8 \text{ m}} \]

4. **Perform the division**:
Now we will calculate \( \frac{45}{1.8} \).
To make the division easier, we can eliminate the decimal by multiplying both the numerator and the denominator by 10:
\[ \frac{45 \times 10}{1.8 \times 10} = \frac{450}{18} \]

5. **Calculate \( \frac{450}{18} \)**:
Dividing 450 by 18 gives us:
\[ 450 \div 18 = 25 \]

6. **Conclusion**:
Therefore, the number of shirts that can be made from 45 meters of cloth is 25.

### Final Answer:
**25 shirts can be made from 45 meters of cloth.**