The depth of the impounded water in a 72 m long earthen dam is 6.2 m, while the tail water is 2.2 m deep. The hydraulic conductivity of the isotropic and homogeneous soil-fill of the dam is 0.53 m day⁻¹. Flow net method is used to estimate seepage wherein the number of flow channels is 6 and the number of potential drops is 21. The seepage rate through the dam in m³ day⁻¹ is _______.