We look at the division of 189439 by 48 
Let's see how many times 48 fits into 189439.

Advancing to step 1:
When dividing 1 by 48, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 48

On to step 2:
The number 48 fits into 18 0 times, leaving a remainder of 18.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 18, we get 18.
Grab the next digit (9) from the dividend, add it to 18, then carry on: 189 / 48

Advancing to step 3:
When dividing 189 by 48, we get 3 with a remainder of 45.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we take 144 away from 189, we end up with 45.
Append the next digit (4) from the dividend to 45 and continue with: 454 / 48

Going ahead to step 4:
48 can be fit into 454 9 times, resulting in a remainder of 22.
The next digit of our result is 9. 
Result so far: 39.0
Subtracting 432 from 454 leaves us with 22.
Include the next digit (3) from the dividend after 22, then repeat: 223 / 48

Advancing to step 5:
If we divide 223 by 48, we get 4 and a remainder of 31.
The next digit of our result is 4. 
Result so far: 394.0
If we take 192 away from 223, we end up with 31.
Append the next digit (9) from the dividend to 31 and continue with: 319 / 48

Moving on to step 6:
319 divided by 48 is 6 with a remainder of 31.
Write down 6 as next digit of the result. 
Result so far: 3946.0
Subtracting 288 from 319 leaves us with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Moving on to step 7:
The number 48 fits into 310 6 times, leaving a remainder of 22.
Use 6 as the next digit of our solution. 
Result so far: 3946.6
Deduct 288 from 310 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 8:
48 goes into 220 4 times with a remainder of 28.
The number 4 becomes the next digit in our result. 
Result so far: 3946.64
Deduct 192 from 220 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 9:
If we divide 280 by 48, we get 5 and a remainder of 40.
Record the quotient 5 as the next digit in the result. 
Result so far: 3946.645
The remainder is 40 after subtracting 240 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 10:
The number 48 fits into 400 8 times, leaving a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 3946.6458
If we subtract 384 from 400, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 11:
If we divide 160 by 48, we get 3 and a remainder of 16.
The number 3 becomes the next digit in our result. 
Result so far: 3946.64583
The remainder is 16 after subtracting 144 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 12:
160 divided by 48 is 3 with a remainder of 16.
Record the quotient 3 as the next digit in the result. 
Result so far: 3946.645833
If we subtract 144 from 160, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final outcome is 3946.645833, with a leftover of 1.6e-06.