Find closest multiple of $120$ to $1000$. We see that $8 \times 120 = 960$ is the nearest. Now subtract $960$ from $1000$ to get reminder $40$. Add $8$ to quotient.
Find closest multiple of $120$ to $400$. We see that $3 \times 120 = 360$ is the nearest. Now subtract $360$ from $400$ to get reminder $40$. Add $3$ to quotient.
Since $40$ is less than $120$, stop the division. The reminder is $40$. The topmost line $00083$ is the quotient. Remove all zeros at the start of the quotient to get the actual quotient $83$.