We look at the division of 42555933 by 661 
We're looking to find how many times 661 goes into 42555933.

Let's proceed to step 1:
661 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 661

Moving on to step 2:
When dividing 42 by 661, we get 0 with a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 42 to get 42.
Fetch the next digit (5) from the dividend, attach it to 42 and continue: 425 / 661

Advancing to step 3:
When dividing 425 by 661, we get 0 with a remainder of 425.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 425, we get 425.
Grab the next digit (5) from the dividend, add it to 425, then carry on: 4255 / 661

Moving on to step 4:
If we divide 4255 by 661, we get 6 and a remainder of 289.
The next digit of our result is 6. 
Result so far: 6.0
Subtract 3966 from 4255 to get 289.
Bring next digit (5) of the dividend behind the 289 and repeat the process: 2895 / 661

Let's proceed to step 5:
The number 661 fits into 2895 4 times, leaving a remainder of 251.
Record the quotient 4 as the next digit in the result. 
Result so far: 64.0
If we subtract 2644 from 2895, we get 251.
Grab the next digit (9) from the dividend, add it to 251, then carry on: 2519 / 661

Let's proceed to step 6:
When dividing 2519 by 661, we get 3 with a remainder of 536.
Write down 3 as next digit of the result. 
Result so far: 643.0
Deduct 1983 from 2519 and we're left with 536.
Include the next digit (3) from the dividend after 536, then repeat: 5363 / 661

Going ahead to step 7:
When dividing 5363 by 661, we get 8 with a remainder of 75.
The next digit of our result is 8. 
Result so far: 6438.0
If we subtract 5288 from 5363, we get 75.
Bring next digit (3) of the dividend behind the 75 and repeat the process: 753 / 661

Going ahead to step 8:
If we divide 753 by 661, we get 1 and a remainder of 92.
The next digit of our result is 1. 
Result so far: 64381.0
Subtracting 661 from 753 leaves us with 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Let's proceed to step 9:
If we divide 920 by 661, we get 1 and a remainder of 259.
The next digit of our result is 1. 
Result so far: 64381.1
Deduct 661 from 920 and we're left with 259.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2590, and continue the process.

Moving on to step 10:
661 can be fit into 2590 3 times, resulting in a remainder of 607.
The number 3 becomes the next digit in our result. 
Result so far: 64381.13
Deduct 1983 from 2590 and we're left with 607.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6070, and continue the process.

Step 11:
661 can be fit into 6070 9 times, resulting in a remainder of 121.
The number 9 becomes the next digit in our result. 
Result so far: 64381.139
The remainder is 121 after subtracting 5949 from 6070.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1210, and continue the process.

Step 12:
1210 divided by 661 is 1 with a remainder of 549.
Put 1 as the next digit of the answer. 
Result so far: 64381.1391
Subtract 661 from 1210 to get 549.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5490, and continue the process.

Let's proceed to step 13:
If we divide 5490 by 661, we get 8 and a remainder of 202.
Record the quotient 8 as the next digit in the result. 
Result so far: 64381.13918
Subtract 5288 from 5490 to get 202.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

On to step 14:
If we divide 2020 by 661, we get 3 and a remainder of 37.
The next digit of our result is 3. 
Result so far: 64381.139183
Deduct 1983 from 2020 and we're left with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Step 15:
661 can be fit into 370 0 times, resulting in a remainder of 370.
Use 0 as the next digit of our solution. 
Result so far: 64381.139183
Subtracting 0 from 370 leaves us with 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Moving on to step 16:
If we divide 3700 by 661, we get 5 and a remainder of 395.
Write down 5 as next digit of the result. 
Result so far: 64381.13918305
Subtract 3305 from 3700 to get 395.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

After the division, we end up with 64381.13918305 and a remainder of 3.95e-07.