We look at the division of 76521 by 84 
Our goal is to divide 76521 by 84.

Step 1:
7 divided by 84 is 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Grab the next digit (6) from the dividend, add it to 7, then carry on: 76 / 84

Let's proceed to step 2:
76 divided by 84 is 0 with a remainder of 76.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 76 after subtracting 0 from 76.
Append the next digit (5) from the dividend to 76 and continue with: 765 / 84

Advancing to step 3:
765 divided by 84 is 9 with a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Deduct 756 from 765 and we're left with 9.
Include the next digit (2) from the dividend after 9, then repeat: 92 / 84

Let's proceed to step 4:
92 divided by 84 is 1 with a remainder of 8.
The number 1 becomes the next digit in our result. 
Result so far: 91.0
The remainder is 8 after subtracting 84 from 92.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 84

Moving on to step 5:
When dividing 81 by 84, we get 0 with a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 910.0
The remainder is 81 after subtracting 0 from 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Going ahead to step 6:
When dividing 810 by 84, we get 9 with a remainder of 54.
Write down 9 as next digit of the result. 
Result so far: 910.9
The remainder is 54 after subtracting 756 from 810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 7:
The number 84 fits into 540 6 times, leaving a remainder of 36.
Record the quotient 6 as the next digit in the result. 
Result so far: 910.96
Deduct 504 from 540 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 8:
84 goes into 360 4 times with a remainder of 24.
Write down 4 as next digit of the result. 
Result so far: 910.964
Subtracting 336 from 360 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 9:
When dividing 240 by 84, we get 2 with a remainder of 72.
Put 2 as the next digit of the answer. 
Result so far: 910.9642
Subtracting 168 from 240 leaves us with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

On to step 10:
720 divided by 84 is 8 with a remainder of 48.
Use 8 as the next digit of our solution. 
Result so far: 910.96428
If we take 672 away from 720, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 11:
The number 84 fits into 480 5 times, leaving a remainder of 60.
Put 5 as the next digit of the answer. 
Result so far: 910.964285
The remainder is 60 after subtracting 420 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 12:
600 divided by 84 is 7 with a remainder of 12.
Write down 7 as next digit of the result. 
Result so far: 910.9642857
Deduct 588 from 600 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 13:
84 can be fit into 120 1 times, resulting in a remainder of 36.
Record the quotient 1 as the next digit in the result. 
Result so far: 910.96428571
If we take 84 away from 120, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

The final outcome is 910.96428571, with a leftover of 3.6e-08.