curl --request POST \
  --url https://api.iotools.cloud/v1/tool/ohms-law-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "knownPair": "vi",
  "voltage": "12",
  "current": "2",
  "resistance": "6",
  "power": "24"
}
'

{
  "tool": "ohms-law-calculator",
  "tool_version": "1.0.1",
  "outputs": {
    "resultTable": [
      {
        "quantity": "Voltage (V)",
        "value": "12 V"
      },
      {
        "quantity": "Current (I)",
        "value": "2 A"
      },
      {
        "quantity": "Resistance (R)",
        "value": "6 Ω"
      },
      {
        "quantity": "Power (P)",
        "value": "24 W"
      }
    ],
    "formulas": "Known: Voltage (V), Current (I)\nSolved: Resistance (R), Power (P)\n\nFormulas:\n  R = V ÷ I\n  P = V × I\n\nSteps:\n  R = 12 V ÷ 2 A = 6 Ω\n  P = 12 V × 2 A = 24 W"
  },
  "credits_used": 3,
  "credits_remaining": null
}