We're dividing 169439 by 4 
Our goal is to divide 169439 by 4.

Step 1:
The number 4 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 4

Moving on to step 2:
4 goes into 16 4 times with a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Deduct 16 from 16 and we're left with 0.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 4

Moving on to step 3:
4 goes into 9 2 times with a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 42.0
If we subtract 8 from 9, we get 1.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 4

Advancing to step 4:
If we divide 14 by 4, we get 3 and a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 423.0
Subtract 12 from 14 to get 2.
Include the next digit (3) from the dividend after 2, then repeat: 23 / 4

Going ahead to step 5:
23 divided by 4 is 5 with a remainder of 3.
Use 5 as the next digit of our solution. 
Result so far: 4235.0
The remainder is 3 after subtracting 20 from 23.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 4

Advancing to step 6:
The number 4 fits into 39 9 times, leaving a remainder of 3.
The next digit of our result is 9. 
Result so far: 42359.0
If we subtract 36 from 39, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 7:
When dividing 30 by 4, we get 7 with a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 42359.7
Subtract 28 from 30 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 8:
4 goes into 20 5 times with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 42359.75
If we take 20 away from 20, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
The number 4 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 42359.75
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
If we divide 0 by 4, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 42359.75
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 42359.75 with a remaining 0.0.