Find closest multiple of $99$ to $100$. We see that $1 \times 99 = 99$ is the nearest. Now subtract $99$ from $100$ to get reminder $1$. Add $1$ to quotient.
Find closest multiple of $99$ to $198$. We see that $2 \times 99 = 198$ is the nearest. Now subtract $198$ from $198$ to get reminder $0$. Add $2$ to quotient.
Since $0$ is less than $99$, stop the division. The reminder is $0$. The topmost line $00102$ is the quotient. Remove all zeros at the start of the quotient to get the actual quotient $102$.