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:
| Name | Street address | Years as tallest | Height ft / m | Floors |
| --- | --- | --- | --- | --- |
| Equitable Building | 730 17th Street | 1892–1910 | 148 / 45 | 9.0 |
| Daniels & Fisher Tower | 1601 Arapahoe Street | 1910–1957 | 371 / 113 | 20.0 |
| 621 17th Street | 621 17th Street | 1957–1968 | 384 / 117 | 28.0 |
| 1600 Glenarm Place | 1600 Glenarm Place | 1967–1968 | 384 / 117 | 32.0 |
| Brooks Tower | 1020 15th Street | 1968–1974 | 420 / 128 | 42.0 |
| First Interstate Tower North | 633 17th Street | 1974–1978 | 434 / 132 | 32.0 |
| 555 17th Street | 555 17th Street | 1978–1981 | 509 / 155 | 40.0 |
| MCI Plaza | 707 17th Street | 1981–1982 | 522 / 159 | 42.0 |
| 1801 California Street | 1801 California Street | 1982–1984 | 709 / 216 | 53.0 |
| Republic Plaza | 330 17th Street | 1984–present | 714 / 218 | 56.0 |
Question:
What is the height of the building named 555 17th street?
Answer:
509 / 155