Find closest multiple of $18$ to $48$. We see that $2 \times 18 = 36$ is the nearest. Now subtract $36$ from $48$ to get reminder $12$. Add $2$ to quotient.
Find closest multiple of $18$ to $125$. We see that $6 \times 18 = 108$ is the nearest. Now subtract $108$ from $125$ to get reminder $17$. Add $6$ to quotient.
Since $17$ is less than $18$, stop the division. The reminder is $17$. The topmost line $026$ is the quotient. Remove all zeros at the start of the quotient to get the actual quotient $26$.