Task: Formula-prediction-context (source dataset: ti-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                  |
|---:|:----|:------------------------------------------------------------------------------------------|:---------------------------------------------------------------|:-------------------|:----|:---------------------|:------|:----|:----|:-------------------|:--------------|:----|:-------------------|
|  7 |     | OVset                                                                                     | Over Voltage Cut-Off Threshold                                 | 30.0               | V   |                      |       |     |     |                    |               |     |                    |
|  8 |     | Cout                                                                                      | Load Capacitance                                               | 220.0              | µF  | 0.1                  |       |     |     |                    |               |     |                    |
|  9 |     | TA (max)                                                                                  | Max Ambient Temperature                                        | 85.0               | °C  |                      |       |     |     |                    |               |     |                    |
| 10 |     | RLstart                                                                                   | Load at start-up (assumed to be resistive)                     | 48.0               | Ω   |                      |       |     |     |                    |               |     |                    |
| 11 |     | Imax                                                                                      | Maximum continuous load current                                | 1.0                | A   |                      |       |     |     |                    |               |     |                    |
| 12 |     | ILimit                                                                                    | Current Limit, 20% higher than maximum continuous load current | 1.2                | A   |                      |       |     |     |                    |               |     |                    |
| 13 |     |                                                                                           |                                                                |                    |     |                      |       |     |     |                    |               |     |                    |
| 14 |     | UVLO, OVP Calculations                                                                    |                                                                |                    |     |                      |       |     |     |                    |               |     |                    |
| 15 |     | R3_sel                                                                                    | Select a value in the range from 10k to 49.9k                  | 30.1               | kΩ  | 0.01                 |       |     |     |                    |               |     | 301.0              |
| 16 |     | R2_cal                                                                                    | Calculated value of Resistor at UVLO pin                       | 20.066666666666663 | kΩ  |                      |       |     |     | 16.643478260869564 | Power Fail    |     | 200.66666666666663 |
|    |     |                                                                                           |                                                                |                    |     |                      |       |     |     |                    | (VIN Falling) |     |                    |
| 17 |     | R1_cal                                                                                    | Calculated value of Resistor at IN pin                         | 708.6568627450982  | kΩ  |                      |       |     |     | [Target Cell]      | UVLO          |     | 708.6568627450982  |
|    |     |                                                                                           |                                                                |                    |     |                      |       |     |     |                    | (VIN Rising)  |     |                    |
| 18 |     | SELECT THE VALUE OF RESISTORS AS CLOSEST AVAILABLE VALUE OF R2,R3 & R8 (refer schematics) |                                                                |                    |     |                      |       |     |     | 30.267906976744186 | OV            |     |                    |
|    |     |                                                                                           |                                                                |                    |     |                      |       |     |     |                    | (VIN Rising)  |     |                    |
| 19 |     | R3_sel                                                                                    | Select the closest possible value as R3_cal                    | 30.1               | kΩ  | 0.01                 | 30.1  |     |     |                    |               |     | 301.0              |
| 20 |     | R2_sel                                                                                    | Select the closest possible value as R2_cal                    | 20.5               | kΩ  | 0.01                 | 20.5  |     |     |                    |               |     | 205.0              |
| 21 |     | R1_sel                                                                                    | Select the closest possible value as R1_cal                    | 715.0              | kΩ  | 0.01                 | 715.0 |     |     |                    |               |     | 715.0              |
| 22 |     | UV_Final                                                                                  | Undervoltage Lockout Threshold                                 | 18.005217391304345 | V   | 0.033778691508109075 |       |     |     |                    |               |     |                    |
| 23 |     | OV_Final                                                                                  | Over Voltage Cut-Off Threshold                                 | 30.267906976744186 | V   | 0.033778691508109075 |       |     |     |                    |               |     |                    |
| 24 |     | Power Fail Detection                                                                      | Power Fail Detection Threshold                                 | 16.643478260869564 | V   | 0.033778691508109075 |       |     |     |                    |               |     |                    |
| 25 |     | I_R123                                                                                    | Current in R1, R2, R3 Branch                                   | 39.18495297805642  | uA  |                      |       |     |     |                    |               |     |                    |
| 26 |     |                                                                                           |                                                                |                    |     |                      |       |     |     |                    |               |     |                    |
| 27 |     | Current Limit Calculations                                                                |                                                                |                    |     |                      |       |     |     |                    |               |     |                    |



min_row: 7
max_row: 27
min_col: 1
max_col: 13
target_cell_row_idx: 17
target_cell_col_idx: 10
target_cell_value: 18.005217391304345
formula: =D22