We look at the division of 15030990 by 821 
We want to divide 15030990 by 821.

Step 1:
If we divide 1 by 821, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our 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 / 821

Moving on to step 2:
When dividing 15 by 821, we get 0 with a remainder of 15.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Fetch the next digit (0) from the dividend, attach it to 15 and continue: 150 / 821

Advancing to step 3:
When dividing 150 by 821, we get 0 with a remainder of 150.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 150, we end up with 150.
Include the next digit (3) from the dividend after 150, then repeat: 1503 / 821

Moving on to step 4:
If we divide 1503 by 821, we get 1 and a remainder of 682.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 821 from 1503 to get 682.
Grab the next digit (0) from the dividend, add it to 682, then carry on: 6820 / 821

Moving on to step 5:
When dividing 6820 by 821, we get 8 with a remainder of 252.
The next digit of our result is 8. 
Result so far: 18.0
Subtract 6568 from 6820 to get 252.
Include the next digit (9) from the dividend after 252, then repeat: 2529 / 821

Let's proceed to step 6:
821 goes into 2529 3 times with a remainder of 66.
The next digit of our result is 3. 
Result so far: 183.0
Subtract 2463 from 2529 to get 66.
Include the next digit (9) from the dividend after 66, then repeat: 669 / 821

Step 7:
821 goes into 669 0 times with a remainder of 669.
The number 0 becomes the next digit in our result. 
Result so far: 1830.0
The remainder is 669 after subtracting 0 from 669.
Fetch the next digit (0) from the dividend, attach it to 669 and continue: 6690 / 821

Advancing to step 8:
If we divide 6690 by 821, we get 8 and a remainder of 122.
The number 8 becomes the next digit in our result. 
Result so far: 18308.0
If we take 6568 away from 6690, we end up with 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Step 9:
If we divide 1220 by 821, we get 1 and a remainder of 399.
Put 1 as the next digit of the answer. 
Result so far: 18308.1
Deduct 821 from 1220 and we're left with 399.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3990, and continue the process.

Let's proceed to step 10:
The number 821 fits into 3990 4 times, leaving a remainder of 706.
The number 4 becomes the next digit in our result. 
Result so far: 18308.14
Subtract 3284 from 3990 to get 706.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7060, and continue the process.

Let's proceed to step 11:
821 goes into 7060 8 times with a remainder of 492.
The number 8 becomes the next digit in our result. 
Result so far: 18308.148
If we take 6568 away from 7060, we end up with 492.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4920, and continue the process.

Advancing to step 12:
If we divide 4920 by 821, we get 5 and a remainder of 815.
Write down 5 as next digit of the result. 
Result so far: 18308.1485
The remainder is 815 after subtracting 4105 from 4920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8150, and continue the process.

Going ahead to step 13:
8150 divided by 821 is 9 with a remainder of 761.
Put 9 as the next digit of the answer. 
Result so far: 18308.14859
If we take 7389 away from 8150, we end up with 761.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7610, and continue the process.

Advancing to step 14:
821 can be fit into 7610 9 times, resulting in a remainder of 221.
The next digit of our result is 9. 
Result so far: 18308.148599
The remainder is 221 after subtracting 7389 from 7610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2210, and continue the process.

The quotient of the division is 18308.148599, and the remainder is 2.21e-05.