Find closest multiple of $43$ to $84$. We see that $1 \times 43 = 43$ is the nearest. Now subtract $43$ from $84$ to get reminder $41$. Add $1$ to quotient.
Find closest multiple of $43$ to $411$. We see that $9 \times 43 = 387$ is the nearest. Now subtract $387$ from $411$ to get reminder $24$. Add $9$ to quotient.
Since $24$ is less than $43$, stop the division. The reminder is $24$. The topmost line $019$ is the quotient. Remove all zeros at the start of the quotient to get the actual quotient $19$.