Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Official Name | Status | Area km 2 | Population | Census Ranking |
| --- | --- | --- | --- | --- |
| Lincoln | Parish | 159.83 | 6458.0 | 579 of 5,008 |
| Burton | Parish | 259.48 | 5421.0 | 667 of 5,008 |
| Maugerville | Parish | 921.31 | 1776.0 | 1,445 of 5,008 |
| Sheffield | Parish | 271.95 | 853.0 | 2,286 of 5,008 |
| Blissville | Parish | 342.4 | 926.0 | 2,178 of 5,008 |
| Northfield | Parish | 304.06 | 643.0 | 2,689 of 5,008 |
| Gladstone | Parish | 362.18 | 485.0 | 3,051 of 5,008 |
Question:
What is the population of northfield parish that has an area less than 342.4?
Answer:
643.0