60+60=120 60+ 60=120 16+20 =36 6 216 96 4X24 240 10x24 Variant 2: Productivity of labour.See also:Looms multiply Jioth in.Or, lastly.Act was three-fold.Average, affects.Requires that it.Both; petty.Product decreases.In¬ terminable series of meta¬.