To simplify the expression \((2g^6)(4g^{46})\), follow these steps:
- Multiply the coefficients: \(2 \times 4 = 8\).
- Add the exponents of \(g\): When multiplying like bases, you add the exponents. So, \(g^6 \times g^{46} = g^{6 + 46} = g^{52}\).
Combining these results gives:
\[ (2g^6)(4g^{46}) = 8g^{52} \]
Thus, the simplified expression is:
\[ \boxed{8g^{52}} \]