Find closest multiple of $52$ to $343$. We see that $6 \times 52 = 312$ is the nearest. Now subtract $312$ from $343$ to get reminder $31$. Add $6$ to quotient.
Find closest multiple of $52$ to $312$. We see that $6 \times 52 = 312$ is the nearest. Now subtract $312$ from $312$ to get reminder $0$. Add $6$ to quotient.
Since $0$ is less than $52$, stop the division. The reminder is $0$. The topmost line $0066$ is the quotient. Remove all zeros at the start of the quotient to get the actual quotient $66$.