One cubic meter is equal to 1,000 liters. This is because the volume of a cube with sides of one meter (100 centimeters) is calculated as 100 cm × 100 cm × 100 cm, which equals 1,000,000 cubic centimeters. Since one liter is equivalent to 1,000 cubic centimeters, 1,000,000 cubic centimeters divided by 1,000 equals 1,000 liters.
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