Final answer:
The volume of the gallstone is approximately 904.78 cubic millimeters.
Step-by-step explanation:
The volume of a sphere can be calculated using the formula V = (4/3)πr³, where V is the volume and r is the radius of the sphere. In this case, the diameter of the gallstone is given, so we can find the radius by dividing the diameter by 2. The radius of the gallstone is 6 millimeters (12 millimeters ÷ 2). Plugging this value into the formula, we get:
V = (4/3) × π × (6 mm)³
V ≈ 904.78 mm³
Therefore, the volume of the gallstone is approximately 904.78 cubic millimeters.