78889765 ÷ 261 
We want to figure out the number of times 78889765 can be divided by 261.

Advancing to step 1:
261 goes into 7 0 times with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 261

Step 2:
If we divide 78 by 261, we get 0 and a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 78 after subtracting 0 from 78.
Bring next digit (8) of the dividend behind the 78 and repeat the process: 788 / 261

Advancing to step 3:
788 divided by 261 is 3 with a remainder of 5.
The next digit of our result is 3. 
Result so far: 3.0
If we subtract 783 from 788, we get 5.
Bring next digit (8) of the dividend behind the 5 and repeat the process: 58 / 261

On to step 4:
261 can be fit into 58 0 times, resulting in a remainder of 58.
Use 0 as the next digit of our solution. 
Result so far: 30.0
The remainder is 58 after subtracting 0 from 58.
Grab the next digit (9) from the dividend, add it to 58, then carry on: 589 / 261

Step 5:
If we divide 589 by 261, we get 2 and a remainder of 67.
Put 2 as the next digit of the answer. 
Result so far: 302.0
Deduct 522 from 589 and we're left with 67.
Append the next digit (7) from the dividend to 67 and continue with: 677 / 261

Moving on to step 6:
The number 261 fits into 677 2 times, leaving a remainder of 155.
The number 2 becomes the next digit in our result. 
Result so far: 3022.0
Subtracting 522 from 677 leaves us with 155.
Take the next digit (6) from the dividend and append it to 155, then repeat: 1556 / 261

On to step 7:
The number 261 fits into 1556 5 times, leaving a remainder of 251.
The number 5 becomes the next digit in our result. 
Result so far: 30225.0
If we take 1305 away from 1556, we end up with 251.
Bring next digit (5) of the dividend behind the 251 and repeat the process: 2515 / 261

On to step 8:
When dividing 2515 by 261, we get 9 with a remainder of 166.
The number 9 becomes the next digit in our result. 
Result so far: 302259.0
The remainder is 166 after subtracting 2349 from 2515.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

Moving on to step 9:
1660 divided by 261 is 6 with a remainder of 94.
Use 6 as the next digit of our solution. 
Result so far: 302259.6
Subtract 1566 from 1660 to get 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

On to step 10:
The number 261 fits into 940 3 times, leaving a remainder of 157.
Put 3 as the next digit of the answer. 
Result so far: 302259.63
If we take 783 away from 940, we end up with 157.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1570, and continue the process.

Moving on to step 11:
261 can be fit into 1570 6 times, resulting in a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 302259.636
The remainder is 4 after subtracting 1566 from 1570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 12:
The number 261 fits into 40 0 times, leaving a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 302259.636
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 13:
The number 261 fits into 400 1 times, leaving a remainder of 139.
The number 1 becomes the next digit in our result. 
Result so far: 302259.63601
The remainder is 139 after subtracting 261 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1390, and continue the process.

Advancing to step 14:
If we divide 1390 by 261, we get 5 and a remainder of 85.
Put 5 as the next digit of the answer. 
Result so far: 302259.636015
If we subtract 1305 from 1390, we get 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

On to step 15:
When dividing 850 by 261, we get 3 with a remainder of 67.
The number 3 becomes the next digit in our result. 
Result so far: 302259.6360153
If we subtract 783 from 850, we get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

On to step 16:
261 goes into 670 2 times with a remainder of 148.
Put 2 as the next digit of the answer. 
Result so far: 302259.63601532
Subtract 522 from 670 to get 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

The final result is 302259.63601532 with a remainder of 1.48e-07.