The radius of the base of a solid cylind...

The radius of the base of a solid cylinder is 7 cm and its height is 21 cm. It is melted into small tablets. Each bullet is identical. Each bullet has two parts which is a cylinder and has a semicircle. The total height of the bullet is 3.5 cm. And the radius of the base is 2.1 cm. How many complete bullets can be obtained ?

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