How do you simplify m cubed m to the power of six?

To simplify (m^3 \times m^6), you add the exponents when multiplying like bases. In this case, the base is (m), so you would add the exponents 3 and 6 to get (m^{3+6} = m^9). Therefore, (m^3 \times m^6) simplifies to (m^9).