Find closest multiple of $12$ to $73$. We see that $6 \times 12 = 72$ is the nearest. Now subtract $72$ from $73$ to get reminder $1$. Add $6$ to quotient.
Since $1$ is less than $12$, stop the division. The reminder is $1$. The topmost line $06$ is the quotient. Remove all zeros at the start of the quotient to get the actual quotient $6$.