import type { CbmInput, CbmResult } from './types.js';
/**
 * Calculate Cubic Meter (CBM) for shipping cargo
 *
 * @formula CBM = Length × Width × Height (all converted to meters)
 *   - Total CBM = CBM per unit × Quantity
 *
 * @reference Physical volume formula (L × W × H).
 * @reference Industry standard: 20ft container internal ≈ 33.2 m³, 40ft ≈ 67.7 m³.
 *
 * @units input: mm, cm, or m; output: m³
 *
 * @param input - Cargo dimensions and quantity
 * @returns CBM per unit and total CBM
 */
export declare function cbm(input: CbmInput): CbmResult;
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