Find closest multiple of $9000$ to $19092$. We see that $2 \times 9000 = 18000$ is the nearest. Now subtract $18000$ from $19092$ to get reminder $1092$. Add $2$ to quotient.
Find closest multiple of $9000$ to $10924$. We see that $1 \times 9000 = 9000$ is the nearest. Now subtract $9000$ from $10924$ to get reminder $1924$. Add $1$ to quotient.
Since $1924$ is less than $9000$, stop the division. The reminder is $1924$. The topmost line $000021$ is the quotient. Remove all zeros at the start of the quotient to get the actual quotient $21$.