how do is solve this

The volume of a cube is the length of its side cubed. In this case, the length is 3c^(6)d^(2). You must cube this to get the answer.
To do this, we first cube the coefficient of the first term, 3. 3 cubed is 27.
Next, we must cube c^(6) and d^(2). You raise an exponent to a power by multiplying the exponent by the power it is being raised to. In this case, we will multiply 6 and 2 by 3, and we get 18 and 6.
Our answer is:
27c^(18)d^(6)
Hope this helped and good luck!