Excel File / Sheet become slow

I have to copy this formula in almost 4,000,000 cells of MS Excel/ Google sheets, but once did so Excel/Sheet become getting totally freeze due to formula

Pls suggest a way forward

Formula to be copied in cells,

=IF($B18>L$5,"",IF($E18>6,IF(SUM($G18:K18)<$F18,MIN($F18-SUM($G18:K18),6*MIN($D18,L$4),L$3-SUM(L$6:L17)),0),IF(SUM($G18:K18)<$F18,MIN($F18-SUM($G18:K18),L$3-SUM(L$6:L17)),0)))