meatballcraft/config/modularmachinery/recipes/alloy_smelter_furnaces.adapter.json

{
    "machine": "alloy_furnace",
    "adapter": "minecraft:furnace",
    "modifiers": [
        {
            "target": "modularmachinery:item",
            "io": "output",
            "operation": 1,
            "multiplier": 3.0
        },
        {
            "target": "modularmachinery:item",
            "io": "input",
            "operation": 1,
            "multiplier": 3.0
        },
        {
            "target": "modularmachinery:duration",
            "io": "input",
            "operation": 0,
            "multiplier": 40
        }
    ]
}