Evaluate 81*9

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

Multiply ${\displaystyle 9}$ by ${\displaystyle 8}$. Place the ones digit ${\displaystyle \left(2\right)}$ in the result line and carry the tens digit ${\displaystyle \left(7\right)}$. There is one result line for each digit in ${\displaystyle 9}$.

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

Add the numbers in each column. In this case, add ${\displaystyle 2}$, then place the ${\displaystyle 2}$ in the result line.

Add the numbers in each column. In this case, add ${\displaystyle 7}$, then place the ${\displaystyle 7}$ in the result line.