Find closest multiple of $11$ to $43$. We see that $3 \times 11 = 33$ is the nearest. Now subtract $33$ from $43$ to get reminder $10$. Add $3$ to quotient.
Since $10$ is less than $11$, stop the division. The reminder is $10$. The topmost line $03$ is the quotient. Remove all zeros at the start of the quotient to get the actual quotient $3$.