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:
| Rank | City | 1890 census | 1910 census | 1920 census | 1930 census | 1940 census |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | Keijō | 1,165,000 | 230000.0 | 247000.0 | 350000.0 | 1100000.0 |
| 2.0 | Fuzan | NA | 81000.0 | 74000.0 | 130000.0 | 400000.0 |
| 3.0 | Heijō | NA | 40000.0 | 60000.0 | 137000.0 | 286000.0 |
| 4.0 | Jinsen | NA | 30000.0 | 40000.0 | 54000.0 | 171000.0 |
| 5.0 | Taihoku | 78,000 | 95000.0 | 164000.0 | 249000.0 | 326000.0 |
| 6.0 | Tainan | NA | 44000.0 | 112000.0 | 166000.0 | 296000.0 |
Question:
How many cities had a census of 400000 in 1940?
Answer:
1.0