Evaluate 3*17

Multiply ${\displaystyle 7}$ by ${\displaystyle 3}$. Place the ones digit ${\displaystyle \left(1\right)}$ in the result line and carry the tens digit ${\displaystyle \left(2\right)}$. There is one result line for each digit in ${\displaystyle 17}$.

Multiply ${\displaystyle 1}$ by ${\displaystyle 3}$. Place the result in the next column in the result line. There is one result line for each digit in ${\displaystyle 17}$.

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

Add the numbers in each column. In this case, add ${\displaystyle 2+3}$, then place the ${\displaystyle 5}$ in the result line.