{"success":true,"calculator":"mulch","inputs":{"length_ft":10,"width_ft":10,"depth_in":3,"material":"mulch"},"results":{"area_sqft":100,"volume_cubic_yards":0.93,"volume_cubic_feet":25,"bags_2cuft":13,"weight_lbs":370},"formula":"Cu Yd = (Length × Width × Depth_in ÷ 12) ÷ 27","notes":"Material: mulch. 2-3\" for mulch, 4-6\" for topsoil."}