$\"\"$

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The word “product” indicates multiplication and the symbol is “ $\"\"$ ”.

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The word “square of the radius $\"\"$ of the base” indicates “ $\"\"$ ”. $\"\"$

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Rewrite the sentence into expression as

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$\"\"$

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Volume of the cone is $\"\"$ . $\"\"$ $\"\"$

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$\"\"$ (Substitute $\"\"$ , $\"\"$ and $\"\"$ )

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$\"\"$ (Evaluate the power: $\"\"$ )

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$\"\"$ (Multiply: $\"\"$ )

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$\"\"$ (Divide: $\"\"$ )

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$\"\"$ (Multiply: $\"\"$ ) \ \ $\"\"$

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Volume of the cone $\"\"$ .