We're dividing 15391623 by 386 
We want to divide 15391623 by 386.

On to step 1:
If we divide 1 by 386, we get 0 and a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 386

Advancing to step 2:
When dividing 15 by 386, we get 0 with a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Fetch the next digit (3) from the dividend, attach it to 15 and continue: 153 / 386

Going ahead to step 3:
386 can be fit into 153 0 times, resulting in a remainder of 153.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 153 leaves us with 153.
Fetch the next digit (9) from the dividend, attach it to 153 and continue: 1539 / 386

Let's proceed to step 4:
If we divide 1539 by 386, we get 3 and a remainder of 381.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 1158 from 1539, we get 381.
Take the next digit (1) from the dividend and append it to 381, then repeat: 3811 / 386

On to step 5:
When dividing 3811 by 386, we get 9 with a remainder of 337.
The number 9 becomes the next digit in our result. 
Result so far: 39.0
Subtracting 3474 from 3811 leaves us with 337.
Include the next digit (6) from the dividend after 337, then repeat: 3376 / 386

Step 6:
3376 divided by 386 is 8 with a remainder of 288.
Write down 8 as next digit of the result. 
Result so far: 398.0
If we subtract 3088 from 3376, we get 288.
Bring next digit (2) of the dividend behind the 288 and repeat the process: 2882 / 386

Step 7:
386 goes into 2882 7 times with a remainder of 180.
Put 7 as the next digit of the answer. 
Result so far: 3987.0
Subtracting 2702 from 2882 leaves us with 180.
Take the next digit (3) from the dividend and append it to 180, then repeat: 1803 / 386

Moving on to step 8:
1803 divided by 386 is 4 with a remainder of 259.
Write down 4 as next digit of the result. 
Result so far: 39874.0
If we subtract 1544 from 1803, we get 259.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2590, and continue the process.

Step 9:
386 goes into 2590 6 times with a remainder of 274.
Use 6 as the next digit of our solution. 
Result so far: 39874.6
Subtract 2316 from 2590 to get 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

Going ahead to step 10:
386 goes into 2740 7 times with a remainder of 38.
The next digit of our result is 7. 
Result so far: 39874.67
Deduct 2702 from 2740 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 11:
When dividing 380 by 386, we get 0 with a remainder of 380.
The number 0 becomes the next digit in our result. 
Result so far: 39874.67
The remainder is 380 after subtracting 0 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Let's proceed to step 12:
386 can be fit into 3800 9 times, resulting in a remainder of 326.
The number 9 becomes the next digit in our result. 
Result so far: 39874.6709
The remainder is 326 after subtracting 3474 from 3800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3260, and continue the process.

On to step 13:
If we divide 3260 by 386, we get 8 and a remainder of 172.
The next digit of our result is 8. 
Result so far: 39874.67098
Deduct 3088 from 3260 and we're left with 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Step 14:
When dividing 1720 by 386, we get 4 with a remainder of 176.
The number 4 becomes the next digit in our result. 
Result so far: 39874.670984
If we take 1544 away from 1720, we end up with 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Step 15:
The number 386 fits into 1760 4 times, leaving a remainder of 216.
Use 4 as the next digit of our solution. 
Result so far: 39874.6709844
Subtract 1544 from 1760 to get 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

The final outcome is 39874.6709844, with a leftover of 2.16e-06.