We're dividing 84121977 by 810 
We want to figure out the number of times 84121977 can be divided by 810.

Going ahead to step 1:
When dividing 8 by 810, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Grab the next digit (4) from the dividend, add it to 8, then carry on: 84 / 810

Moving on to step 2:
When dividing 84 by 810, we get 0 with a remainder of 84.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 84 after subtracting 0 from 84.
Fetch the next digit (1) from the dividend, attach it to 84 and continue: 841 / 810

Going ahead to step 3:
If we divide 841 by 810, we get 1 and a remainder of 31.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 810 from 841 and we're left with 31.
Include the next digit (2) from the dividend after 31, then repeat: 312 / 810

On to step 4:
If we divide 312 by 810, we get 0 and a remainder of 312.
The next digit of our result is 0. 
Result so far: 10.0
If we subtract 0 from 312, we get 312.
Grab the next digit (1) from the dividend, add it to 312, then carry on: 3121 / 810

Let's proceed to step 5:
When dividing 3121 by 810, we get 3 with a remainder of 691.
The number 3 becomes the next digit in our result. 
Result so far: 103.0
If we subtract 2430 from 3121, we get 691.
Append the next digit (9) from the dividend to 691 and continue with: 6919 / 810

Advancing to step 6:
810 can be fit into 6919 8 times, resulting in a remainder of 439.
Use 8 as the next digit of our solution. 
Result so far: 1038.0
If we take 6480 away from 6919, we end up with 439.
Bring next digit (7) of the dividend behind the 439 and repeat the process: 4397 / 810

Step 7:
If we divide 4397 by 810, we get 5 and a remainder of 347.
The number 5 becomes the next digit in our result. 
Result so far: 10385.0
If we take 4050 away from 4397, we end up with 347.
Take the next digit (7) from the dividend and append it to 347, then repeat: 3477 / 810

Moving on to step 8:
810 can be fit into 3477 4 times, resulting in a remainder of 237.
Use 4 as the next digit of our solution. 
Result so far: 103854.0
Subtracting 3240 from 3477 leaves us with 237.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2370, and continue the process.

Step 9:
When dividing 2370 by 810, we get 2 with a remainder of 750.
Put 2 as the next digit of the answer. 
Result so far: 103854.2
Subtract 1620 from 2370 to get 750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7500, and continue the process.

Let's proceed to step 10:
810 can be fit into 7500 9 times, resulting in a remainder of 210.
The next digit of our result is 9. 
Result so far: 103854.29
Subtracting 7290 from 7500 leaves us with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Let's proceed to step 11:
810 goes into 2100 2 times with a remainder of 480.
Use 2 as the next digit of our solution. 
Result so far: 103854.292
If we subtract 1620 from 2100, we get 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Let's proceed to step 12:
When dividing 4800 by 810, we get 5 with a remainder of 750.
Use 5 as the next digit of our solution. 
Result so far: 103854.2925
Subtracting 4050 from 4800 leaves us 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.

Moving on to step 13:
When dividing 7500 by 810, we get 9 with a remainder of 210.
Record the quotient 9 as the next digit in the result. 
Result so far: 103854.29259
The remainder is 210 after subtracting 7290 from 7500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Let's proceed to step 14:
The number 810 fits into 2100 2 times, leaving a remainder of 480.
The number 2 becomes the next digit in our result. 
Result so far: 103854.292592
If we subtract 1620 from 2100, we get 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Going ahead to step 15:
When dividing 4800 by 810, we get 5 with a remainder of 750.
Use 5 as the next digit of our solution. 
Result so far: 103854.2925925
Subtracting 4050 from 4800 leaves us 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.

Let's proceed to step 16:
When dividing 7500 by 810, we get 9 with a remainder of 210.
Record the quotient 9 as the next digit in the result. 
Result so far: 103854.29259259
The remainder is 210 after subtracting 7290 from 7500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

The final outcome is 103854.29259259, with a leftover of 2.1e-07.