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The problem asks how many garden edging lengths are needed for a perimeter of 14 meters, with each length being 1800 millimeters.

Here are the steps to solve this:

1. Convert the 1800mm length to meters:
   \[
   1800 \text{ mm} = \frac{1800}{1000} = 1.8 \text{ m}
   \]

2. Divide the total perimeter by the length of one garden edging piece:
   \[
   \frac{14 \text{ m}}{1.8 \text{ m}} = 7.7777\ldots
   \]

3. Since you can't buy a fraction of a piece, round up to the next whole number:
   \[
   \lceil 7.7777\ldots \rceil = 8
   \]

Therefore, you need to buy **8 lengths** of garden edging to cover the entire perimeter.

Would you like more details or have any other questions?

Here are some related questions you could explore:
1. How would the answer change if the perimeter was 20m?
2. What if the garden edging length was 1500mm instead of 1800mm?
3. How can you calculate the number of lengths required if the perimeter is given in feet?
4. What would happen if the perimeter was an irregular shape—how would you calculate the total length?
5. How can you use this approach to calculate material needs for other projects, like fencing?

**Tip:** Always remember to round up when dealing with quantities like this, as partial units can't typically be purchased.

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 garden edging lengths needed for a 14-meter perimeter. The edging comes in 1800mm lengths, and this problem involves simple division, unit conversion, and rounding. Suitable for Grades 5-7.

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