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?

To solve this problem, we need to determine how many 1800mm lengths of garden edging are required to cover a perimeter of 14 meters.

### Step-by-Step Solution

1. **Convert the perimeter from meters to millimeters:**

   Since 1 meter (m) equals 1000 millimeters (mm), we have:

   \[
   14 \, \text{m} = 14 \times 1000 = 14000 \, \text{mm}
   \]

2. **Calculate the number of lengths required:**

   Each garden edging length is 1800mm. To find out how many lengths are needed to cover the entire perimeter, divide the total perimeter in millimeters by the length of one piece of edging:

   \[
   \text{Number of lengths} = \frac{14000 \, \text{mm}}{1800 \, \text{mm}}
   \]

   Let's perform the division:

   \[
   \text{Number of lengths} = \frac{14000}{1800} \approx 7.78
   \]

3. **Determine the total number of lengths to buy:**

   Since you can't buy a fraction of a length, you need to round up to the next whole number. 

   \[
   \text{Number of lengths needed} = \lceil 7.78 \rceil = 8
   \]

### Conclusion

You will need to buy **8 lengths** of garden edging to cover the entire perimeter of your garden.

---

Would you like further details or have any questions?

### Related Questions:

1. How much would it cost if each length of garden edging is priced at $5?
2. What is the total length of the garden edging in meters once all 8 pieces are joined?
3. If the garden's shape is rectangular, what could be its possible dimensions?
4. How much extra edging will you have after covering the perimeter?
5. What if the garden perimeter were increased by 10%? How many lengths would be needed then?

#### Tip:
When planning for materials, always consider buying a little extra to account for errors or adjustments.

Find out how to calculate the number of 1800mm garden edging lengths required for a garden with a perimeter of 14 meters. This solution involves unit conversion, division, and rounding, making it perfect for students in Grades 5-7.

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