Can you evaluate $\log_{3}(243)$ without a calculator? Of course you can. $243=9 \cdot 27\text{;}$ therefore $\log_{3}(243)=\log_{3}(9 \cdot 27)$ so that $$\log_{3}(243)=\log_{3}(9)+\log_{3}(27)$$ What power of $3$ gives you $9\text{?}$ $\log_{3}(9)=$ What power of $3$ gives you $27\text{?}$ $\log_{3}(27)=$ Therefore $\log_{3}(243)=$