Let's divide 15021690 by 486
We're looking to find how many times 486 goes into 15021690.

Going ahead to step 1:
When dividing 1 by 486, we get 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 486

Going ahead to step 2:
15 divided by 486 is 0 with a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Include the next digit (0) from the dividend after 15, then repeat: 150 / 486

Step 3:
486 can be fit into 150 0 times, resulting in a remainder of 150.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 150, we get 150.
Fetch the next digit (2) from the dividend, attach it to 150 and continue: 1502 / 486

Moving on to step 4:
486 can be fit into 1502 3 times, resulting in a remainder of 44.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 1458 from 1502 leaves us with 44.
Grab the next digit (1) from the dividend, add it to 44, then carry on: 441 / 486

Advancing to step 5:
486 goes into 441 0 times with a remainder of 441.
Record the quotient 0 as the next digit in the result. 
Result so far: 30.0
Subtract 0 from 441 to get 441.
Grab the next digit (6) from the dividend, add it to 441, then carry on: 4416 / 486

Going ahead to step 6:
If we divide 4416 by 486, we get 9 and a remainder of 42.
The next digit of our result is 9. 
Result so far: 309.0
If we take 4374 away from 4416, we end up with 42.
Take the next digit (9) from the dividend and append it to 42, then repeat: 429 / 486

On to step 7:
486 can be fit into 429 0 times, resulting in a remainder of 429.
Write down 0 as next digit of the result. 
Result so far: 3090.0
Subtracting 0 from 429 leaves us with 429.
Include the next digit (0) from the dividend after 429, then repeat: 4290 / 486

Step 8:
486 can be fit into 4290 8 times, resulting in a remainder of 402.
The next digit of our result is 8. 
Result so far: 30908.0
Deduct 3888 from 4290 and we're left with 402.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

Let's proceed to step 9:
486 can be fit into 4020 8 times, resulting in a remainder of 132.
The number 8 becomes the next digit in our result. 
Result so far: 30908.8
If we subtract 3888 from 4020, we get 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Going ahead to step 10:
486 can be fit into 1320 2 times, resulting in a remainder of 348.
The number 2 becomes the next digit in our result. 
Result so far: 30908.82
If we subtract 972 from 1320, we get 348.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3480, and continue the process.

Let's proceed to step 11:
If we divide 3480 by 486, we get 7 and a remainder of 78.
Record the quotient 7 as the next digit in the result. 
Result so far: 30908.827
If we take 3402 away from 3480, we end up with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

On to step 12:
486 can be fit into 780 1 times, resulting in a remainder of 294.
Use 1 as the next digit of our solution. 
Result so far: 30908.8271
Subtracting 486 from 780 leaves us with 294.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2940, and continue the process.

Let's proceed to step 13:
2940 divided by 486 is 6 with a remainder of 24.
Use 6 as the next digit of our solution. 
Result so far: 30908.82716
The remainder is 24 after subtracting 2916 from 2940.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Step 14:
486 goes into 240 0 times with a remainder of 240.
Put 0 as the next digit of the answer. 
Result so far: 30908.82716
Subtract 0 from 240 to get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

On to step 15:
486 can be fit into 2400 4 times, resulting in a remainder of 456.
The next digit of our result is 4. 
Result so far: 30908.8271604
The remainder is 456 after subtracting 1944 from 2400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

Let's proceed to step 16:
When dividing 4560 by 486, we get 9 with a remainder of 186.
Record the quotient 9 as the next digit in the result. 
Result so far: 30908.82716049
Deduct 4374 from 4560 and we're left with 186.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

The final outcome is 30908.82716049, with a leftover of 1.86e-07.