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     | F        | G                      | H             | I          | J             | K   | L   | M   |
|---:|:----|:----|:-------------------------------------------------------------------------------------------------------------------------|:-------------------------------------------------------|:------|:---------|:-----------------------|:--------------|:-----------|:--------------|:----|:----|:----|
|  2 |     |     |                                                                                                                          |                                                        |       |          |                        | 0             | 0          |               |     |     |     |
|  3 |     |     | Produit                                                                                                                  | Description                                            | Année | Quantité | Prix de liste Unitaire | Cost unitaire | Cost Total | Prix de vente |     |     |     |
|  4 |     |     | Cisco Unified Communication 500 includes(8 users licences for UC & integrated messaging+4 FxO+8 Poe+integrated wireless) |                                                        |       |          |                        |               |            |               |     |     |     |
|  5 |     |     | UC540W-FXO-K9                                                                                                            | UC System with 4FXO, 1VIC Exp                          |       | 1        | 3652                   | 3652          | 3652       | 3652          |     |     |     |
|  6 |     |     | CAB-AC                                                                                                                   | AC Power Cord (North America), C13, NEMA 5-15P, 2.1m   |       | 1        | 0                      | 0             | 0          | 0             |     |     |     |
|  7 |     |     | AIR-ANT2422DB-R                                                                                                          | 2.4 GHz 2.2 dBi Swivel Dipole Antenna Black, RP-TNC    |       | 1        | 0                      | 0             | 0          | 0             |     |     |     |
|  8 |     |     | CD-SBCS-PRO                                                                                                              | CD for SBCS Pro Products                               |       | 1        | 0                      | 0             | 0          | 0             |     |     |     |
|  9 |     |     | PWR-UC500-220W                                                                                                           | Cisco Unified 500 Desk Top Power Adapter 100-240VAC    |       | 1        | 0                      | 0             | 0          | 0             |     |     |     |
| 10 |     |     | UC500-256CF                                                                                                              | UC500 SB Pro 256MB CF                                  |       | 1        | 0                      | 0             | 0          | 0             |     |     |     |
| 11 |     |     | Cisco IP PHONES                                                                                                          |                                                        |       |          |                        |               |            |               |     |     |     |
| 12 |     |     | CP-7931G=                                                                                                                | Cisco UC phone 7931G                                   |       | 5        | 384                    | 384           | 1920       | [Target Cell] |     |     |     |
| 13 |     |     | CP-7925G-A-K9=                                                                                                           | Cisco 7925G FCC; Battery/Power Supply Not Included     |       | 2        | 797                    | 797           | 1594       | 1594          |     |     |     |
| 14 |     |     | Cisco PoE switch                                                                                                         |                                                        |       |          |                        |               |            |               |     |     |     |
| 15 |     |     | WS-C2960-24PC-L                                                                                                          | Catalyst 2960 24 10/100 PoE + 2 T/SFP   LAN Base Image |       | 1        | 2944                   | 2944          | 2944       | 2944          |     |     |     |
| 16 |     |     |                                                                                                                          |                                                        |       | 0        | 0                      | 0             | 0          | 0             |     |     |     |
| 17 |     |     |                                                                                                                          |                                                        |       | 0        | 0                      | 0             | 0          | 0             |     |     |     |
| 18 |     |     |                                                                                                                          |                                                        |       |          |                        | 0             |            | 10110         |     |     |     |
| 19 |     |     |                                                                                                                          |                                                        |       |          |                        | 0             | 0          |               |     |     |     |
| 20 |     |     | Service 3 ans                                                                                                            |                                                        |       |          |                        |               |            |               |     |     |     |
| 21 |     |     | CON-SBS-SVC4                                                                                                             | SBS 8x5xNBD 3yr Small Business Support Svc 4           | 3     | 1        | 589                    | 589           | 1767       | 1767          |     |     |     |
| 22 |     |     |                                                                                                                          |                                                        |       |          |                        |               | 0          | 0             |     |     |     |



min_row: 2
max_row: 22
min_col: 1
max_col: 13
target_cell_row_idx: 12
target_cell_col_idx: 10
target_cell_value: 1920
formula: =I12/(1-I$2)