Task: Formula-prediction-context (source dataset: cisco-random)

You are given an table region extracted from a real Excel spreadsheet, which is centered around a cell called "Target Cell" (labeled as "[Target Cell]" shown in the table below). The table region below includes up to 10 rows above/below the Target Cell, and 10 columns to the left/right of the Target Cell. 

Your task is to analyze the table context surrounding the Target Cell, and predict the most likely Excel formula that should go in the Target Cell. If multiple formulas are possible, choose the most reasonable or commonly used based on context.

1. Please follow the standard formula syntax in Excel, e.g. always begins with an equal sign (=).
2. Base your predicted formula on the surrounding table context, e.g., column headers, annotations, and data values in nearby cells.
3. No explanation — just output the formula itself in a JSON format: {"formula": "your_formula_here"}.

Input Excel Snippet in Markdown format:
|    | A                                                                | B                                                                   | C                                                        | D                                                        | E                                                         |
|---:|:-----------------------------------------------------------------|:--------------------------------------------------------------------|:---------------------------------------------------------|:---------------------------------------------------------|:----------------------------------------------------------|
|  2 |                                                                  | 3,000 endpoints - configured (registered/unregistered)              | 20,000 endpoints  - configured (registered/unregistered) | 80,000 endpoints  - configured (registered/unregistered) | 150,000 endpoints  - configured (registered/unregistered) |
|    |                                                                  | additional 5% unknown                                               | additional 5% unknown                                    | additional 5% unknown                                    | additional 5% unknown                                     |
|  3 | Concurrent client (browser) logins                               | 5                                                                   | 5                                                        | 8                                                        | 15                                                        |
|  4 | End Users                                                        | 3,000 (+5% buffer)                                                  | 20,000 (+5% buffer)                                      | 80,000 (+5% buffer)                                      | 150,000 (+5% buffer)                                      |
|  5 | Device Support                                                   |                                                                     |                                                          |                                                          |                                                           |
|  6 | Network IP devices(Infrastructure devices)                       | 300                                                                 | 1000                                                     | 2000                                                     | 3000                                                      |
|  7 | Contact Center Deployment support (concurrent agent/ OVA)        | 450                                                                 | 4000                                                     | 8000                                                     | 12000                                                     |
|  8 | Contact Center devices support                                   | As per the CC Agent deployment support applicable for each OVA type |                                                          |                                                          |                                                           |
|  9 | MSP # Customers                                                  | NA                                                                  | NA                                                       | 20                                                       | 50                                                        |
| 10 | Unified Communications Managers / Presence Nodes                 | 9                                                                   | 30                                                       | 100                                                      | 200                                                       |
| 11 | Cisco Unified Communications Manager Express/Cisco Unity Express | 100                                                                 | 300/250                                                  | 750/750                                                  | 1,500/1,500                                               |
| 12 | Cisco Unity Connection Clusters                                  | 3                                                                   | 10                                                       | [Target Cell]                                            | 100                                                       |
| 13 | VCS Clusters                                                     | 1                                                                   | 3                                                        | 4                                                        | 10                                                        |
| 14 | Expressway Nodes                                                 | 6                                                                   | 20                                                       | 40                                                       | 100                                                       |
| 15 | H.323/ MGCP Gateways/Voice Gateways/Routers                      | 100                                                                 | 500                                                      | 950                                                      | 1500                                                      |
| 16 | vNAM                                                             | 20                                                                  | 60                                                       | 225                                                      | 372                                                       |
| 17 | Locations                                                        | 150                                                                 | 1000                                                     | 3000                                                     | 4,500 (recommended 1,500 per cluster)                     |
| 18 | Device Pools                                                     | 150                                                                 | 1000                                                     | 4000                                                     | 5200                                                      |
| 19 | Route lists and route groups                                     | 250                                                                 | 500                                                      | 1000                                                     | 2000                                                      |
| 20 | Voice Interfs                                                    | 500                                                                 | 1500                                                     | 4000                                                     | 15000                                                     |
| 21 | Devices in Full/Limited visibility                               | 200                                                                 | 500                                                      | 1000                                                     | 1500                                                      |
| 22 | Diagnostics Tests                                                |                                                                     |                                                          |                                                          |                                                           |



min_row: 2
max_row: 22
min_col: 1
max_col: 5
target_cell_row_idx: 12
target_cell_col_idx: 4
target_cell_value: 40
formula: =D9*2