We're dividing 15188423 by 423 
Let's see how many times 423 fits into 15188423.

Advancing to step 1:
423 goes into 1 0 times with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 423

On to step 2:
15 divided by 423 is 0 with a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Append the next digit (1) from the dividend to 15 and continue with: 151 / 423

Advancing to step 3:
When dividing 151 by 423, we get 0 with a remainder of 151.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 151 to get 151.
Grab the next digit (8) from the dividend, add it to 151, then carry on: 1518 / 423

Advancing to step 4:
1518 divided by 423 is 3 with a remainder of 249.
The next digit of our result is 3. 
Result so far: 3.0
If we take 1269 away from 1518, we end up with 249.
Include the next digit (8) from the dividend after 249, then repeat: 2498 / 423

Going ahead to step 5:
The number 423 fits into 2498 5 times, leaving a remainder of 383.
Record the quotient 5 as the next digit in the result. 
Result so far: 35.0
If we subtract 2115 from 2498, we get 383.
Grab the next digit (4) from the dividend, add it to 383, then carry on: 3834 / 423

Moving on to step 6:
423 can be fit into 3834 9 times, resulting in a remainder of 27.
Put 9 as the next digit of the answer. 
Result so far: 359.0
The remainder is 27 after subtracting 3807 from 3834.
Append the next digit (2) from the dividend to 27 and continue with: 272 / 423

On to step 7:
423 goes into 272 0 times with a remainder of 272.
Use 0 as the next digit of our solution. 
Result so far: 3590.0
The remainder is 272 after subtracting 0 from 272.
Append the next digit (3) from the dividend to 272 and continue with: 2723 / 423

Going ahead to step 8:
423 goes into 2723 6 times with a remainder of 185.
The number 6 becomes the next digit in our result. 
Result so far: 35906.0
If we subtract 2538 from 2723, we get 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Moving on to step 9:
If we divide 1850 by 423, we get 4 and a remainder of 158.
Write down 4 as next digit of the result. 
Result so far: 35906.4
If we take 1692 away from 1850, we end up with 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

Advancing to step 10:
The number 423 fits into 1580 3 times, leaving a remainder of 311.
Write down 3 as next digit of the result. 
Result so far: 35906.43
If we subtract 1269 from 1580, we get 311.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3110, and continue the process.

Let's proceed to step 11:
423 can be fit into 3110 7 times, resulting in a remainder of 149.
The number 7 becomes the next digit in our result. 
Result so far: 35906.437
The remainder is 149 after subtracting 2961 from 3110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

Advancing to step 12:
1490 divided by 423 is 3 with a remainder of 221.
The next digit of our result is 3. 
Result so far: 35906.4373
Subtract 1269 from 1490 to get 221.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2210, and continue the process.

Going ahead to step 13:
423 can be fit into 2210 5 times, resulting in a remainder of 95.
Write down 5 as next digit of the result. 
Result so far: 35906.43735
Subtracting 2115 from 2210 leaves us with 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Going ahead to step 14:
When dividing 950 by 423, we get 2 with a remainder of 104.
The number 2 becomes the next digit in our result. 
Result so far: 35906.437352
Subtract 846 from 950 to get 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Advancing to step 15:
The number 423 fits into 1040 2 times, leaving a remainder of 194.
Put 2 as the next digit of the answer. 
Result so far: 35906.4373522
Deduct 846 from 1040 and we're left with 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

The final outcome is 35906.4373522, with a leftover of 1.94e-06.