Evaluate 40*3

Multiply ${\displaystyle 3}$ by ${\displaystyle 0}$. Place the result in the next column in the result line. There is one result line for each digit in ${\displaystyle 3}$.

Multiply ${\displaystyle 3}$ by ${\displaystyle 4}$. Place the ones digit ${\displaystyle \left(2\right)}$ in the result line and carry the tens digit ${\displaystyle \left(1\right)}$. There is one result line for each digit in ${\displaystyle 3}$.

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