curl --request POST \
  --url https://api.iotools.cloud/v1/tool/wallpaper-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "unitSystem": "metric",
  "perimeter": "16",
  "wallHeight": "2.4",
  "rollWidth": "53",
  "rollLength": "1005",
  "patternRepeat": "0",
  "wastagePct": "10",
  "pricePerRoll": "25"
}
'

{
  "tool": "wallpaper-calculator",
  "tool_version": "1.0.2",
  "outputs": {
    "results": [
      {
        "metric": "Wall length",
        "value": "16.00 m"
      },
      {
        "metric": "Drop length (with pattern repeat)",
        "value": "240.0 cm"
      },
      {
        "metric": "Drops needed (no wastage)",
        "value": "31 drops"
      },
      {
        "metric": "Drops needed (with wastage)",
        "value": "35 drops (+10%)"
      },
      {
        "metric": "Drops per roll",
        "value": "4 drops"
      },
      {
        "metric": "Rolls to buy",
        "value": "9 rolls"
      },
      {
        "metric": "Coverage from purchase",
        "value": "47.94 m²"
      },
      {
        "metric": "Estimated cost",
        "value": "$225.00"
      }
    ],
    "summary": "35 drops +10% · 9 rolls · $225.00 total"
  },
  "credits_used": 5,
  "credits_remaining": null
}