Translation of "الـ15" in English

وبعد أن ينتهي من عرضه ذو الـ15 دقيقة،

and then after he was done with his 15-minute pitch,

‫ما أن تضع بيوضها الـ15،‬ ‫عليها العودة من حيث بدأت.‬

As soon as she's laid her 15 eggs, she must get back to where she started.