91866130 ÷ 261 
Our goal is to divide 91866130 by 261.

Advancing to step 1:
261 goes into 9 0 times with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 261

Let's proceed to step 2:
The number 261 fits into 91 0 times, leaving a remainder of 91.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 91, we get 91.
Grab the next digit (8) from the dividend, add it to 91, then carry on: 918 / 261

Let's proceed to step 3:
918 divided by 261 is 3 with a remainder of 135.
The next digit of our result is 3. 
Result so far: 3.0
The remainder is 135 after subtracting 783 from 918.
Take the next digit (6) from the dividend and append it to 135, then repeat: 1356 / 261

Step 4:
1356 divided by 261 is 5 with a remainder of 51.
Write down 5 as next digit of the result. 
Result so far: 35.0
Deduct 1305 from 1356 and we're left with 51.
Fetch the next digit (6) from the dividend, attach it to 51 and continue: 516 / 261

On to step 5:
261 goes into 516 1 times with a remainder of 255.
Use 1 as the next digit of our solution. 
Result so far: 351.0
If we subtract 261 from 516, we get 255.
Take the next digit (1) from the dividend and append it to 255, then repeat: 2551 / 261

Step 6:
The number 261 fits into 2551 9 times, leaving a remainder of 202.
Put 9 as the next digit of the answer. 
Result so far: 3519.0
If we subtract 2349 from 2551, we get 202.
Grab the next digit (3) from the dividend, add it to 202, then carry on: 2023 / 261

Moving on to step 7:
2023 divided by 261 is 7 with a remainder of 196.
Write down 7 as next digit of the result. 
Result so far: 35197.0
The remainder is 196 after subtracting 1827 from 2023.
Take the next digit (0) from the dividend and append it to 196, then repeat: 1960 / 261

Moving on to step 8:
261 can be fit into 1960 7 times, resulting in a remainder of 133.
Put 7 as the next digit of the answer. 
Result so far: 351977.0
The remainder is 133 after subtracting 1827 from 1960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1330, and continue the process.

Step 9:
261 goes into 1330 5 times with a remainder of 25.
The number 5 becomes the next digit in our result. 
Result so far: 351977.5
Subtract 1305 from 1330 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 10:
When dividing 250 by 261, we get 0 with a remainder of 250.
Put 0 as the next digit of the answer. 
Result so far: 351977.5
Subtract 0 from 250 to get 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Step 11:
261 can be fit into 2500 9 times, resulting in a remainder of 151.
Write down 9 as next digit of the result. 
Result so far: 351977.509
Subtracting 2349 from 2500 leaves us with 151.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1510, and continue the process.

Advancing to step 12:
261 can be fit into 1510 5 times, resulting in a remainder of 205.
Record the quotient 5 as the next digit in the result. 
Result so far: 351977.5095
The remainder is 205 after subtracting 1305 from 1510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

Let's proceed to step 13:
If we divide 2050 by 261, we get 7 and a remainder of 223.
Put 7 as the next digit of the answer. 
Result so far: 351977.50957
Subtracting 1827 from 2050 leaves us 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.

Step 14:
When dividing 2230 by 261, we get 8 with a remainder of 142.
Put 8 as the next digit of the answer. 
Result so far: 351977.509578
Deduct 2088 from 2230 and we're left with 142.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1420, and continue the process.

Step 15:
When dividing 1420 by 261, we get 5 with a remainder of 115.
The number 5 becomes the next digit in our result. 
Result so far: 351977.5095785
Deduct 1305 from 1420 and we're left with 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Let's proceed to step 16:
261 can be fit into 1150 4 times, resulting in a remainder of 106.
Use 4 as the next digit of our solution. 
Result so far: 351977.50957854
The remainder is 106 after subtracting 1044 from 1150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

The final result is 351977.50957854 with a remainder of 1.06e-07.