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The question asks for the number of 1800 mm garden edging lengths needed to cover a garden perimeter of 14 meters.

### Step-by-Step Solution:

1. **Convert the perimeter from meters to millimeters**:  
   Since 1 meter = 1000 mm, the perimeter in millimeters is:
   \[
   14 \, \text{meters} = 14 \times 1000 = 14000 \, \text{mm}
   \]

2. **Determine how many 1800 mm lengths are required**:  
   Divide the total perimeter by the length of one garden edging piece (1800 mm):
   \[
   \frac{14000}{1800} \approx 7.78
   \]
   Since the number of lengths must be a whole number, round up to the nearest whole number:
   \[
   \text{You will need } 8 \text{ lengths}.
   \]

### Answer:  
You need **8** lengths of garden edging to cover the entire perimeter.

Would you like more details on the steps? Here are 5 related questions you might find helpful:

1. How would you solve this if the garden perimeter were 20 meters instead of 14 meters?
2. How do you handle similar problems if the garden edging length were in feet instead of millimeters?
3. What if you could only buy the edging in 2-meter pieces? How would the calculation change?
4. How can you calculate leftover edging if the garden perimeter doesn't divide evenly?
5. What if the garden is not a simple shape? How would you calculate the total edging required?

**Tip**: Always check the units and convert them properly when dealing with problems involving lengths in different units!

You need garden edging for a garden with a perimeter of 14m. Garden edging comes in 1800mm lengths. How many lengths will you need to buy to have enough edging for the entire perimeter?

Learn how to calculate the number of 1800mm garden edging lengths required to cover a garden perimeter of 14m. This step-by-step guide involves unit conversion and simple division, suitable for students in Grades 5-7.

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