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:
| # | Original title | Directed by | Written by | Original airdate | Production code |
| --- | --- | --- | --- | --- | --- |
| 3–1 | "Leavin' on a Jet Plane" | Delyth Thomas | Mary Morris | 12February2004 | 3.1 |
| 3–2 | "Supernatural Shelley" | Delyth Thomas | Laura Summers | 12February2004 | 3.2 |
| 3–3 | "Jackie" | Delyth Thomas | Gary Parker | 19February2004 | 3.3 |
| 3–4 | "Free Louise" | Delyth Thomas | Laura Summers | 19February2004 | 3.4 |
| 3–5 | "The Bygraves" | Delyth Thomas | Gary Parker | 26February2004 | 3.5 |
| 3–6 | "Down with School" | Delyth Thomas | Laura Summers | 26February2004 | 3.6 |
| 3–7 | "Crashed and Thrashed" | Delyth Thomas | Mary Morris | 5March2004 | 3.7 |
| 3–8 | "No-one Quite Like Grandpa" | Delyth Thomas | Othniel Smith | 6March2004 | 3.8 |
| 3–9 | "Down to Earth" | Joss Agnew | Dan Anthony | 12March2004 | 3.9 |
| 3–10 | "Nothing Happens Here" | Joss Agnew | Mary Morris | 12March2004 | 3.10 |
| 3–11 | "The Beaker Club" | Joss Agnew | Simon Nicholson | 19March2004 | 3.11 |
| 3–12 | "Power Cut" | Joss Agnew | Abigail Abben Mensah | 19March2004 | 3.12 |
| 3–13 | "Just Desserts" | Joss Agnew | Othniel Smith | 26March2004 | 3.13 |
| 3–14 | "Mind Your Own Business" | Joss Agnew | Holly Lyons | 26March2004 | 3.14 |
| 3–15 | "I Am Not In Love" | Joss Agnew | Holly Lyons | 2April2004 | 3.15 |
| 3–16 | "Time Capsule" | Joss Agnew | Marvin Close | 2April2004 | 3.16 |
| 3–17 | "Football Trial" | Joss Agnew | Andy Walker | 9April2004 | 3.17 |
| 3–18 | "We Are Family" | Joss Agnew | Tracy Brabin | 9April2004 | 3.18 |
| 3–19 | "Be Prepared" | Laurence Wilson | Laura Summers | 16April2004 | 3.19 |
| 3–20 | "Sufia The Silent" | Laurence Wilson | Ariane Sherine | 16April2004 | 3.20 |
| 3–21 | "Babies Suck!" | Laurence Wilson | Mary Morris | 23April2004 | 3.21 |
| 3–22 | "Exploited" | Laurence Wilson | Marvin Close | 23April2004 | 3.22 |
| 3–23 | "Be Quiet" | Laurence Wilson | Dan Anthony | 7May2004 | 3.23 |
| 3–24 | "Dad Trouble" | Laurence Wilson | Gary Parker | 30April2004 | 3.24 |
| 3–25 | "The Big Race" | Laurence Wilson | Gary Parker | 30April2004 | 3.25 |
Question:
What was the production code for "down to earth"?
Answer:
3.9