What's the volume of water after three times of melting into water? (three times of ice density of 0.9 * 10 kg / m three times)

What's the volume of water after three times of melting into water? (three times of ice density of 0.9 * 10 kg / m three times)

Answer: 0.9m ^ 3
Analysis:
M ice = ρ ice V ice = 900 × 1 = 900kg
After melting, the mass remains unchanged, ρ water = 1000 kg / m ^ 3
V water = m ice / ρ water = 900 / 1000 = 0.9m ^ 3
I don't know what to ask