77815928 ÷ 850 
We want to figure out the number of times 77815928 can be divided by 850.

Going ahead to step 1:
7 divided by 850 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 850

Let's proceed to step 2:
When dividing 77 by 850, we get 0 with a remainder of 77.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 77, we get 77.
Fetch the next digit (8) from the dividend, attach it to 77 and continue: 778 / 850

Going ahead to step 3:
778 divided by 850 is 0 with a remainder of 778.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 778 leaves us with 778.
Append the next digit (1) from the dividend to 778 and continue with: 7781 / 850

On to step 4:
When dividing 7781 by 850, we get 9 with a remainder of 131.
The next digit of our result is 9. 
Result so far: 9.0
Subtracting 7650 from 7781 leaves us with 131.
Grab the next digit (5) from the dividend, add it to 131, then carry on: 1315 / 850

Going ahead to step 5:
850 goes into 1315 1 times with a remainder of 465.
The number 1 becomes the next digit in our result. 
Result so far: 91.0
Subtracting 850 from 1315 leaves us with 465.
Grab the next digit (9) from the dividend, add it to 465, then carry on: 4659 / 850

Advancing to step 6:
4659 divided by 850 is 5 with a remainder of 409.
The number 5 becomes the next digit in our result. 
Result so far: 915.0
The remainder is 409 after subtracting 4250 from 4659.
Include the next digit (2) from the dividend after 409, then repeat: 4092 / 850

Going ahead to step 7:
4092 divided by 850 is 4 with a remainder of 692.
Record the quotient 4 as the next digit in the result. 
Result so far: 9154.0
Subtract 3400 from 4092 to get 692.
Bring next digit (8) of the dividend behind the 692 and repeat the process: 6928 / 850

Moving on to step 8:
850 can be fit into 6928 8 times, resulting in a remainder of 128.
The number 8 becomes the next digit in our result. 
Result so far: 91548.0
Subtract 6800 from 6928 to get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Advancing to step 9:
If we divide 1280 by 850, we get 1 and a remainder of 430.
Record the quotient 1 as the next digit in the result. 
Result so far: 91548.1
Subtracting 850 from 1280 leaves us with 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

Advancing to step 10:
850 can be fit into 4300 5 times, resulting in a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 91548.15
Subtract 4250 from 4300 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 11:
500 divided by 850 is 0 with a remainder of 500.
The number 0 becomes the next digit in our result. 
Result so far: 91548.15
Subtracting 0 from 500 leaves us with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Let's proceed to step 12:
5000 divided by 850 is 5 with a remainder of 750.
Use 5 as the next digit of our solution. 
Result so far: 91548.1505
If we take 4250 away from 5000, we end up with 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7500, and continue the process.

Advancing to step 13:
850 can be fit into 7500 8 times, resulting in a remainder of 700.
Write down 8 as next digit of the result. 
Result so far: 91548.15058
The remainder is 700 after subtracting 6800 from 7500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7000, and continue the process.

Let's proceed to step 14:
When dividing 7000 by 850, we get 8 with a remainder of 200.
Record the quotient 8 as the next digit in the result. 
Result so far: 91548.150588
Deduct 6800 from 7000 and we're left with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

The final result is 91548.150588 with a remainder of 2e-05.