12538057 divided by 661 
We want to divide 12538057 by 661.

Step 1:
661 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 661

On to step 2:
The number 661 fits into 12 0 times, leaving a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Bring next digit (5) of the dividend behind the 12 and repeat the process: 125 / 661

Advancing to step 3:
The number 661 fits into 125 0 times, leaving a remainder of 125.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 125 to get 125.
Take the next digit (3) from the dividend and append it to 125, then repeat: 1253 / 661

Going ahead to step 4:
If we divide 1253 by 661, we get 1 and a remainder of 592.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 661 from 1253 to get 592.
Append the next digit (8) from the dividend to 592 and continue with: 5928 / 661

Step 5:
5928 divided by 661 is 8 with a remainder of 640.
The next digit of our result is 8. 
Result so far: 18.0
The remainder is 640 after subtracting 5288 from 5928.
Bring next digit (0) of the dividend behind the 640 and repeat the process: 6400 / 661

Moving on to step 6:
The number 661 fits into 6400 9 times, leaving a remainder of 451.
The next digit of our result is 9. 
Result so far: 189.0
The remainder is 451 after subtracting 5949 from 6400.
Bring next digit (5) of the dividend behind the 451 and repeat the process: 4515 / 661

Going ahead to step 7:
661 goes into 4515 6 times with a remainder of 549.
Use 6 as the next digit of our solution. 
Result so far: 1896.0
Deduct 3966 from 4515 and we're left with 549.
Include the next digit (7) from the dividend after 549, then repeat: 5497 / 661

Moving on to step 8:
When dividing 5497 by 661, we get 8 with a remainder of 209.
Use 8 as the next digit of our solution. 
Result so far: 18968.0
The remainder is 209 after subtracting 5288 from 5497.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2090, and continue the process.

Let's proceed to step 9:
When dividing 2090 by 661, we get 3 with a remainder of 107.
Put 3 as the next digit of the answer. 
Result so far: 18968.3
The remainder is 107 after subtracting 1983 from 2090.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1070, and continue the process.

Step 10:
The number 661 fits into 1070 1 times, leaving a remainder of 409.
The number 1 becomes the next digit in our result. 
Result so far: 18968.31
If we subtract 661 from 1070, we get 409.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4090, and continue the process.

Moving on to step 11:
The number 661 fits into 4090 6 times, leaving a remainder of 124.
Write down 6 as next digit of the result. 
Result so far: 18968.316
The remainder is 124 after subtracting 3966 from 4090.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Step 12:
661 can be fit into 1240 1 times, resulting in a remainder of 579.
Put 1 as the next digit of the answer. 
Result so far: 18968.3161
Subtracting 661 from 1240 leaves us with 579.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5790, and continue the process.

Moving on to step 13:
If we divide 5790 by 661, we get 8 and a remainder of 502.
Use 8 as the next digit of our solution. 
Result so far: 18968.31618
The remainder is 502 after subtracting 5288 from 5790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5020, and continue the process.

On to step 14:
When dividing 5020 by 661, we get 7 with a remainder of 393.
Use 7 as the next digit of our solution. 
Result so far: 18968.316187
The remainder is 393 after subtracting 4627 from 5020.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3930, and continue the process.

Moving on to step 15:
3930 divided by 661 is 5 with a remainder of 625.
Use 5 as the next digit of our solution. 
Result so far: 18968.3161875
Deduct 3305 from 3930 and we're left with 625.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6250, and continue the process.

Advancing to step 16:
6250 divided by 661 is 9 with a remainder of 301.
Put 9 as the next digit of the answer. 
Result so far: 18968.31618759
The remainder is 301 after subtracting 5949 from 6250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3010, and continue the process.

The quotient of the division is 18968.31618759, and the remainder is 3.01e-07.