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   | N   | O   | P   | Q   | R   |
|---:|:-----------------------------------------|:----|:----|:----|:----|:----|:--------------------------------------------------------|:-------------------|:----|:----|:----|:----|:----|:----|:----|:----|:----|:----|
| 18 |                                          |     |     |     |     |     |                                                         |                    |     |     |     |     |     |     |     |     |     |     |
| 19 | Step 2: Filter Inductor                  |     |     |     |     |     |                                                         |                    |     |     |     |     |     |     |     |     |     |     |
| 20 |                                          |     |     |     |     |     | Desired Maximum Inductor Current Ripple Ratio (IRR_MAX) | 60                 | %   |     |     |     |     |     |     |     |     |     |
| 21 |                                          |     |     |     |     |     | Recommended Inductance (LM_CALC)                        | 6.733499999999999  | uH  |     |     |     |     |     |     |     |     |     |
| 22 |                                          |     |     |     |     |     | User Selection. Inductance, (LM)                        | 6.8                | uH  |     |     |     |     |     |     |     |     |     |
| 23 |                                          |     |     |     |     |     | Max Inductor DCR, RDCR                                  | 8.9                | mΩ  |     |     |     |     |     |     |     |     |     |
| 24 |                                          |     |     |     |     |     | Peak inductor current, ILPK                             | 12.462856196771638 | A   |     |     |     |     |     |     |     |     |     |
| 25 |                                          |     |     |     |     |     |                                                         |                    |     |     |     |     |     |     |     |     |     |     |
| 26 | Step 3: Current Sense Resistor Selection |     |     |     |     |     |                                                         |                    |     |     |     |     |     |     |     |     |     |     |
| 27 |                                          |     |     |     |     |     | Peak Current Limit Margin                               | 20                 | %   |     |     |     |     |     |     |     |     |     |
| 28 |                                          |     |     |     |     |     | Selected Peak Current limit(ILPK_select)                | [Target Cell]      | A   |     |     |     |     |     |     |     |     |     |
| 29 |                                          |     |     |     |     |     | Recommended current sense Resistor (RS)                 | 6.686535736079495  | mΩ  |     |     |     |     |     |     |     |     |     |
| 30 |                                          |     |     |     |     |     | Recommended external slope compensation Resistor (RSL)  | 0                  | Ω   |     |     |     |     |     |     |     |     |     |
| 31 |                                          |     |     |     |     |     | Selected current sense Resistor (RS)                    | 7                  | mΩ  |     |     |     |     |     |     |     |     |     |
| 32 |                                          |     |     |     |     |     | Selected external slope compensation Resistor (RSL)     | 0                  | Ω   |     |     |     |     |     |     |     |     |     |
| 33 |                                          |     |     |     |     |     | Actual inductor peak current limit                      | 14.285714285714286 | A   |     |     |     |     |     |     |     |     |     |
| 34 |                                          |     |     |     |     |     | Recommend Minimum Inductor Saturation Current Rating    | 16.428571428571427 | A   |     |     |     |     |     |     |     |     |     |
| 35 |                                          |     |     |     |     |     |                                                         |                    |     |     |     |     |     |     |     |     |     |     |
| 36 | Step 4: Output Capacitor Selection       |     |     |     |     |     |                                                         |                    |     |     |     |     |     |     |     |     |     |     |
| 37 |                                          |     |     |     |     |     | Desired Output ripple ripple voltage (ΔvOUT)            | 100                | mV  |     |     |     |     |     |     |     |     |     |
| 38 |                                          |     |     |     |     |     | Minimum output capacitance                              | 36.93181818181819  | uF  |     |     |     |     |     |     |     |     |     |



min_row: 18
max_row: 38
min_col: 1
max_col: 18
target_cell_row_idx: 28
target_cell_col_idx: 8
target_cell_value: 14.955427436125964
formula: =Ipk_selected