35146121 ÷ 661 
Let's see how many times 661 fits into 35146121.

On to step 1:
If we divide 3 by 661, we get 0 and a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Take the next digit (5) from the dividend and append it to 3, then repeat: 35 / 661

Moving on to step 2:
661 can be fit into 35 0 times, resulting in a remainder of 35.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 35 after subtracting 0 from 35.
Fetch the next digit (1) from the dividend, attach it to 35 and continue: 351 / 661

Moving on to step 3:
661 goes into 351 0 times with a remainder of 351.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 351 leaves us with 351.
Fetch the next digit (4) from the dividend, attach it to 351 and continue: 3514 / 661

Step 4:
3514 divided by 661 is 5 with a remainder of 209.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
The remainder is 209 after subtracting 3305 from 3514.
Fetch the next digit (6) from the dividend, attach it to 209 and continue: 2096 / 661

Advancing to step 5:
The number 661 fits into 2096 3 times, leaving a remainder of 113.
The next digit of our result is 3. 
Result so far: 53.0
Subtracting 1983 from 2096 leaves us with 113.
Bring next digit (1) of the dividend behind the 113 and repeat the process: 1131 / 661

On to step 6:
1131 divided by 661 is 1 with a remainder of 470.
Record the quotient 1 as the next digit in the result. 
Result so far: 531.0
The remainder is 470 after subtracting 661 from 1131.
Include the next digit (2) from the dividend after 470, then repeat: 4702 / 661

On to step 7:
661 goes into 4702 7 times with a remainder of 75.
Put 7 as the next digit of the answer. 
Result so far: 5317.0
Subtract 4627 from 4702 to get 75.
Take the next digit (1) from the dividend and append it to 75, then repeat: 751 / 661

Moving on to step 8:
The number 661 fits into 751 1 times, leaving a remainder of 90.
Use 1 as the next digit of our solution. 
Result so far: 53171.0
Subtract 661 from 751 to get 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Advancing to step 9:
The number 661 fits into 900 1 times, leaving a remainder of 239.
The next digit of our result is 1. 
Result so far: 53171.1
Subtract 661 from 900 to get 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

Advancing to step 10:
2390 divided by 661 is 3 with a remainder of 407.
Record the quotient 3 as the next digit in the result. 
Result so far: 53171.13
Deduct 1983 from 2390 and we're left with 407.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4070, and continue the process.

Going ahead to step 11:
4070 divided by 661 is 6 with a remainder of 104.
The number 6 becomes the next digit in our result. 
Result so far: 53171.136
Subtract 3966 from 4070 to get 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Advancing to step 12:
1040 divided by 661 is 1 with a remainder of 379.
The number 1 becomes the next digit in our result. 
Result so far: 53171.1361
If we take 661 away from 1040, we end up with 379.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3790, and continue the process.

On to step 13:
When dividing 3790 by 661, we get 5 with a remainder of 485.
Write down 5 as next digit of the result. 
Result so far: 53171.13615
Subtracting 3305 from 3790 leaves us with 485.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4850, and continue the process.

On to step 14:
4850 divided by 661 is 7 with a remainder of 223.
Use 7 as the next digit of our solution. 
Result so far: 53171.136157
Deduct 4627 from 4850 and we're left with 223.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2230, and continue the process.

Moving on to step 15:
If we divide 2230 by 661, we get 3 and a remainder of 247.
Write down 3 as next digit of the result. 
Result so far: 53171.1361573
Subtracting 1983 from 2230 leaves us with 247.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

Advancing to step 16:
When dividing 2470 by 661, we get 3 with a remainder of 487.
The number 3 becomes the next digit in our result. 
Result so far: 53171.13615733
If we take 1983 away from 2470, we end up with 487.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4870, and continue the process.

In conclusion, the division gives 53171.13615733 with a balance of 4.87e-07.