Find closest multiple of $215$ to $215$. We see that $1 \times 215 = 215$ is the nearest. Now subtract $215$ from $215$ to get reminder $0$. Add $1$ to quotient.
Find closest multiple of $215$ to $798$. We see that $3 \times 215 = 645$ is the nearest. Now subtract $645$ from $798$ to get reminder $153$. Add $3$ to quotient.
Since $153$ is less than $215$, stop the division. The reminder is $153$. The topmost line $001003$ is the quotient. Remove all zeros at the start of the quotient to get the actual quotient $1003$.