We look at the division of 231669 by 78 
We're looking to find how many times 78 goes into 231669.

Going ahead to step 1:
78 can be fit into 2 0 times, resulting in a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Grab the next digit (3) from the dividend, add it to 2, then carry on: 23 / 78

Advancing to step 2:
If we divide 23 by 78, we get 0 and a remainder of 23.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 23, we end up with 23.
Include the next digit (1) from the dividend after 23, then repeat: 231 / 78

Moving on to step 3:
78 goes into 231 2 times with a remainder of 75.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 156 from 231 and we're left with 75.
Include the next digit (6) from the dividend after 75, then repeat: 756 / 78

Let's proceed to step 4:
756 divided by 78 is 9 with a remainder of 54.
Record the quotient 9 as the next digit in the result. 
Result so far: 29.0
Subtract 702 from 756 to get 54.
Fetch the next digit (6) from the dividend, attach it to 54 and continue: 546 / 78

Advancing to step 5:
78 can be fit into 546 7 times, resulting in a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 297.0
If we subtract 546 from 546, we get 0.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 78

Let's proceed to step 6:
When dividing 9 by 78, we get 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 2970.0
If we subtract 0 from 9, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 7:
78 can be fit into 90 1 times, resulting in a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 2970.1
Subtract 78 from 90 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 8:
78 goes into 120 1 times with a remainder of 42.
Put 1 as the next digit of the answer. 
Result so far: 2970.11
The remainder is 42 after subtracting 78 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

The quotient of the division is 2970.11, and the remainder is 0.042.