Budući da jedan sat ima $60$$60$ minuta, množimo:
$$2.4 \cdot 60 = 144\text{ minute}$$$2.4 \cdot 60 = 144\text{ minute}$

(Ili: $2\text{ sata} = 120\text{ min}$$2\text{ sata} = 120\text{ min}$, a $0.4\text{ sata} = 0.4 \cdot 60 = 24\text{ min}$$0.4\text{ sata} = 0.4 \cdot 60 = 24\text{ min}$, pa je ukupno $120 + 24 = 144\text{ min}$$120 + 24 = 144\text{ min}$)

Odgovor: $144$$144$