84975878 ÷ 891 
We want to figure out the number of times 84975878 can be divided by 891.

On to step 1:
8 divided by 891 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Grab the next digit (4) from the dividend, add it to 8, then carry on: 84 / 891

Moving on to step 2:
84 divided by 891 is 0 with a remainder of 84.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 84, we end up with 84.
Fetch the next digit (9) from the dividend, attach it to 84 and continue: 849 / 891

On to step 3:
If we divide 849 by 891, we get 0 and a remainder of 849.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 849 and we're left with 849.
Fetch the next digit (7) from the dividend, attach it to 849 and continue: 8497 / 891

Advancing to step 4:
891 goes into 8497 9 times with a remainder of 478.
Put 9 as the next digit of the answer. 
Result so far: 9.0
The remainder is 478 after subtracting 8019 from 8497.
Include the next digit (5) from the dividend after 478, then repeat: 4785 / 891

Advancing to step 5:
891 goes into 4785 5 times with a remainder of 330.
Record the quotient 5 as the next digit in the result. 
Result so far: 95.0
Subtracting 4455 from 4785 leaves us with 330.
Fetch the next digit (8) from the dividend, attach it to 330 and continue: 3308 / 891

Moving on to step 6:
891 goes into 3308 3 times with a remainder of 635.
Record the quotient 3 as the next digit in the result. 
Result so far: 953.0
If we take 2673 away from 3308, we end up with 635.
Grab the next digit (7) from the dividend, add it to 635, then carry on: 6357 / 891

Step 7:
891 goes into 6357 7 times with a remainder of 120.
Record the quotient 7 as the next digit in the result. 
Result so far: 9537.0
The remainder is 120 after subtracting 6237 from 6357.
Fetch the next digit (8) from the dividend, attach it to 120 and continue: 1208 / 891

Let's proceed to step 8:
When dividing 1208 by 891, we get 1 with a remainder of 317.
The next digit of our result is 1. 
Result so far: 95371.0
Deduct 891 from 1208 and we're left with 317.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3170, and continue the process.

Going ahead to step 9:
891 goes into 3170 3 times with a remainder of 497.
Put 3 as the next digit of the answer. 
Result so far: 95371.3
Subtract 2673 from 3170 to get 497.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4970, and continue the process.

Let's proceed to step 10:
If we divide 4970 by 891, we get 5 and a remainder of 515.
Use 5 as the next digit of our solution. 
Result so far: 95371.35
Subtracting 4455 from 4970 leaves us with 515.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5150, and continue the process.

On to step 11:
When dividing 5150 by 891, we get 5 with a remainder of 695.
The number 5 becomes the next digit in our result. 
Result so far: 95371.355
The remainder is 695 after subtracting 4455 from 5150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6950, and continue the process.

The quotient of the division is 95371.355, and the remainder is 0.0695.