We divide 78402300 by 621
Our goal is to divide 78402300 by 621.

Going ahead to step 1:
If we divide 7 by 621, we get 0 and a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 621

Let's proceed to step 2:
621 can be fit into 78 0 times, resulting in a remainder of 78.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 78, we end up with 78.
Append the next digit (4) from the dividend to 78 and continue with: 784 / 621

Advancing to step 3:
621 goes into 784 1 times with a remainder of 163.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 621 away from 784, we end up with 163.
Include the next digit (0) from the dividend after 163, then repeat: 1630 / 621

Going ahead to step 4:
621 can be fit into 1630 2 times, resulting in a remainder of 388.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Subtracting 1242 from 1630 leaves us with 388.
Append the next digit (2) from the dividend to 388 and continue with: 3882 / 621

Advancing to step 5:
The number 621 fits into 3882 6 times, leaving a remainder of 156.
Use 6 as the next digit of our solution. 
Result so far: 126.0
If we subtract 3726 from 3882, we get 156.
Append the next digit (3) from the dividend to 156 and continue with: 1563 / 621

Step 6:
621 can be fit into 1563 2 times, resulting in a remainder of 321.
The number 2 becomes the next digit in our result. 
Result so far: 1262.0
If we subtract 1242 from 1563, we get 321.
Bring next digit (0) of the dividend behind the 321 and repeat the process: 3210 / 621

Step 7:
621 goes into 3210 5 times with a remainder of 105.
Record the quotient 5 as the next digit in the result. 
Result so far: 12625.0
The remainder is 105 after subtracting 3105 from 3210.
Fetch the next digit (0) from the dividend, attach it to 105 and continue: 1050 / 621

On to step 8:
If we divide 1050 by 621, we get 1 and a remainder of 429.
Put 1 as the next digit of the answer. 
Result so far: 126251.0
The remainder is 429 after subtracting 621 from 1050.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4290, and continue the process.

Step 9:
4290 divided by 621 is 6 with a remainder of 564.
Put 6 as the next digit of the answer. 
Result so far: 126251.6
If we subtract 3726 from 4290, we get 564.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5640, and continue the process.

Moving on to step 10:
The number 621 fits into 5640 9 times, leaving a remainder of 51.
Write down 9 as next digit of the result. 
Result so far: 126251.69
The remainder is 51 after subtracting 5589 from 5640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Let's proceed to step 11:
If we divide 510 by 621, we get 0 and a remainder of 510.
Record the quotient 0 as the next digit in the result. 
Result so far: 126251.69
The remainder is 510 after subtracting 0 from 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Let's proceed to step 12:
The number 621 fits into 5100 8 times, leaving a remainder of 132.
The number 8 becomes the next digit in our result. 
Result so far: 126251.6908
Subtracting 4968 from 5100 leaves us with 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

On to step 13:
If we divide 1320 by 621, we get 2 and a remainder of 78.
Write down 2 as next digit of the result. 
Result so far: 126251.69082
Subtract 1242 from 1320 to get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Step 14:
621 goes into 780 1 times with a remainder of 159.
Record the quotient 1 as the next digit in the result. 
Result so far: 126251.690821
Subtracting 621 from 780 leaves us with 159.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1590, and continue the process.

Advancing to step 15:
621 goes into 1590 2 times with a remainder of 348.
Record the quotient 2 as the next digit in the result. 
Result so far: 126251.6908212
If we subtract 1242 from 1590, we get 348.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3480, and continue the process.

On to step 16:
The number 621 fits into 3480 5 times, leaving a remainder of 375.
Use 5 as the next digit of our solution. 
Result so far: 126251.69082125
The remainder is 375 after subtracting 3105 from 3480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3750, and continue the process.

The final result is 126251.69082125 with a remainder of 3.75e-07.