Let's divide 621993 by 84
Let's see how many times 84 fits into 621993.

Step 1:
84 can be fit into 6 0 times, resulting in a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Bring next digit (2) of the dividend behind the 6 and repeat the process: 62 / 84

Step 2:
The number 84 fits into 62 0 times, leaving a remainder of 62.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 62, we end up with 62.
Take the next digit (1) from the dividend and append it to 62, then repeat: 621 / 84

Moving on to step 3:
621 divided by 84 is 7 with a remainder of 33.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
If we take 588 away from 621, we end up with 33.
Grab the next digit (9) from the dividend, add it to 33, then carry on: 339 / 84

Moving on to step 4:
84 can be fit into 339 4 times, resulting in a remainder of 3.
Record the quotient 4 as the next digit in the result. 
Result so far: 74.0
If we take 336 away from 339, we end up with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 84

On to step 5:
If we divide 39 by 84, we get 0 and a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 740.0
Subtract 0 from 39 to get 39.
Append the next digit (3) from the dividend to 39 and continue with: 393 / 84

Moving on to step 6:
84 can be fit into 393 4 times, resulting in a remainder of 57.
Record the quotient 4 as the next digit in the result. 
Result so far: 7404.0
If we subtract 336 from 393, we get 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Advancing to step 7:
The number 84 fits into 570 6 times, leaving a remainder of 66.
The next digit of our result is 6. 
Result so far: 7404.6
Subtract 504 from 570 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Let's proceed to step 8:
If we divide 660 by 84, we get 7 and a remainder of 72.
The next digit of our result is 7. 
Result so far: 7404.67
Deduct 588 from 660 and we're left 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 9:
If we divide 720 by 84, we get 8 and a remainder of 48.
Use 8 as the next digit of our solution. 
Result so far: 7404.678
Deduct 672 from 720 and we're left 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 10:
84 goes into 480 5 times with a remainder of 60.
The next digit of our result is 5. 
Result so far: 7404.6785
Subtract 420 from 480 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 11:
If we divide 600 by 84, we get 7 and a remainder of 12.
The number 7 becomes the next digit in our result. 
Result so far: 7404.67857
If we subtract 588 from 600, we get 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 12:
The number 84 fits into 120 1 times, leaving a remainder of 36.
Write down 1 as next digit of the result. 
Result so far: 7404.678571
Subtract 84 from 120 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 13:
360 divided by 84 is 4 with a remainder of 24.
The next digit of our result is 4. 
Result so far: 7404.6785714
If we subtract 336 from 360, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 14:
The number 84 fits into 240 2 times, leaving a remainder of 72.
The next digit of our result is 2. 
Result so far: 7404.67857142
If we take 168 away from 240, we end up 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.

The final outcome is 7404.67857142, with a leftover of 7.2e-08.