"The triple number."
Translation:Ο τριπλός αριθμός.
'' Ο τριψήφιος αριθμός'', ή ''το τριψήφιο νούμερο ''λέμε συνήθως στην Ελλάδα.
τριπλός can either mean three times as much (also τριπλάσιος) or consisting of three parts ,the context here doesn't specify that.
I agree with both bonbayel and StellaNtal...I can't imagine what this refers to. Whoever wrote the original sentence must have had something in mind but it isn't clear. We'll have to drop it from the skill.