We're dividing 84530448 by 621 
We want to divide 84530448 by 621.

On to step 1:
If we divide 8 by 621, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Append the next digit (4) from the dividend to 8 and continue with: 84 / 621

Moving on to step 2:
84 divided by 621 is 0 with a remainder of 84.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 84, we end up with 84.
Fetch the next digit (5) from the dividend, attach it to 84 and continue: 845 / 621

Advancing to step 3:
When dividing 845 by 621, we get 1 with a remainder of 224.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 621 from 845, we get 224.
Grab the next digit (3) from the dividend, add it to 224, then carry on: 2243 / 621

Going ahead to step 4:
621 can be fit into 2243 3 times, resulting in a remainder of 380.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
Subtracting 1863 from 2243 leaves us with 380.
Include the next digit (0) from the dividend after 380, then repeat: 3800 / 621

Moving on to step 5:
If we divide 3800 by 621, we get 6 and a remainder of 74.
The number 6 becomes the next digit in our result. 
Result so far: 136.0
If we take 3726 away from 3800, we end up with 74.
Bring next digit (4) of the dividend behind the 74 and repeat the process: 744 / 621

Step 6:
621 goes into 744 1 times with a remainder of 123.
The next digit of our result is 1. 
Result so far: 1361.0
The remainder is 123 after subtracting 621 from 744.
Take the next digit (4) from the dividend and append it to 123, then repeat: 1234 / 621

Advancing to step 7:
If we divide 1234 by 621, we get 1 and a remainder of 613.
Use 1 as the next digit of our solution. 
Result so far: 13611.0
Subtract 621 from 1234 to get 613.
Append the next digit (8) from the dividend to 613 and continue with: 6138 / 621

Moving on to step 8:
621 can be fit into 6138 9 times, resulting in a remainder of 549.
Record the quotient 9 as the next digit in the result. 
Result so far: 136119.0
If we take 5589 away from 6138, we end up with 549.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5490, and continue the process.

Going ahead to step 9:
If we divide 5490 by 621, we get 8 and a remainder of 522.
Put 8 as the next digit of the answer. 
Result so far: 136119.8
If we subtract 4968 from 5490, we get 522.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5220, and continue the process.

Step 10:
621 goes into 5220 8 times with a remainder of 252.
The number 8 becomes the next digit in our result. 
Result so far: 136119.88
If we subtract 4968 from 5220, we get 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

The quotient of the division is 136119.88, and the remainder is 0.252.