Evaluate 9*12

Multiply ${\displaystyle 2}$ by ${\displaystyle 9}$. Place the ones digit ${\displaystyle \left(8\right)}$ in the result line and carry the tens digit ${\displaystyle \left(1\right)}$. There is one result line for each digit in ${\displaystyle 12}$.

Multiply ${\displaystyle 1}$ by ${\displaystyle 9}$. Place the result in the next column in the result line. There is one result line for each digit in ${\displaystyle 12}$.

Add the numbers in each column. In this case, add ${\displaystyle 8+0}$, then place the ${\displaystyle 8}$ in the result line.

Add the numbers in each column. In this case, add ${\displaystyle 1+9}$, then place the ${\displaystyle 0}$ in the result line and carry the ${\displaystyle 1}$.