Let's divide 15581554 by 661
Let's see how many times 661 fits into 15581554.

Moving on to step 1:
661 can be fit into 1 0 times, resulting in 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.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 661

Going ahead to step 2:
When dividing 15 by 661, we get 0 with a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Fetch the next digit (5) from the dividend, attach it to 15 and continue: 155 / 661

Going ahead to step 3:
155 divided by 661 is 0 with a remainder of 155.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 155 leaves us with 155.
Take the next digit (8) from the dividend and append it to 155, then repeat: 1558 / 661

Advancing to step 4:
If we divide 1558 by 661, we get 2 and a remainder of 236.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 1322 from 1558 and we're left with 236.
Take the next digit (1) from the dividend and append it to 236, then repeat: 2361 / 661

On to step 5:
If we divide 2361 by 661, we get 3 and a remainder of 378.
Put 3 as the next digit of the answer. 
Result so far: 23.0
The remainder is 378 after subtracting 1983 from 2361.
Fetch the next digit (5) from the dividend, attach it to 378 and continue: 3785 / 661

Going ahead to step 6:
If we divide 3785 by 661, we get 5 and a remainder of 480.
Put 5 as the next digit of the answer. 
Result so far: 235.0
Subtracting 3305 from 3785 leaves us with 480.
Fetch the next digit (5) from the dividend, attach it to 480 and continue: 4805 / 661

Going ahead to step 7:
661 can be fit into 4805 7 times, resulting in a remainder of 178.
Use 7 as the next digit of our solution. 
Result so far: 2357.0
Subtract 4627 from 4805 to get 178.
Take the next digit (4) from the dividend and append it to 178, then repeat: 1784 / 661

Let's proceed to step 8:
If we divide 1784 by 661, we get 2 and a remainder of 462.
Write down 2 as next digit of the result. 
Result so far: 23572.0
Deduct 1322 from 1784 and we're left with 462.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4620, and continue the process.

Going ahead to step 9:
4620 divided by 661 is 6 with a remainder of 654.
The next digit of our result is 6. 
Result so far: 23572.6
Deduct 3966 from 4620 and we're left with 654.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6540, and continue the process.

Let's proceed to step 10:
661 goes into 6540 9 times with a remainder of 591.
Write down 9 as next digit of the result. 
Result so far: 23572.69
Subtracting 5949 from 6540 leaves us with 591.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5910, and continue the process.

Step 11:
If we divide 5910 by 661, we get 8 and a remainder of 622.
Use 8 as the next digit of our solution. 
Result so far: 23572.698
If we subtract 5288 from 5910, we get 622.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6220, and continue the process.

Advancing to step 12:
The number 661 fits into 6220 9 times, leaving a remainder of 271.
The next digit of our result is 9. 
Result so far: 23572.6989
The remainder is 271 after subtracting 5949 from 6220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2710, and continue the process.

On to step 13:
When dividing 2710 by 661, we get 4 with a remainder of 66.
The next digit of our result is 4. 
Result so far: 23572.69894
The remainder is 66 after subtracting 2644 from 2710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Step 14:
661 goes into 660 0 times with a remainder of 660.
Put 0 as the next digit of the answer. 
Result so far: 23572.69894
Deduct 0 from 660 and we're left with 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6600, and continue the process.

Going ahead to step 15:
6600 divided by 661 is 9 with a remainder of 651.
The number 9 becomes the next digit in our result. 
Result so far: 23572.6989409
Subtract 5949 from 6600 to get 651.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6510, and continue the process.

Advancing to step 16:
When dividing 6510 by 661, we get 9 with a remainder of 561.
Use 9 as the next digit of our solution. 
Result so far: 23572.69894099
Subtracting 5949 from 6510 leaves us with 561.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5610, and continue the process.

After the division, we end up with 23572.69894099 and a remainder of 5.61e-07.