We look at the division of 621945 by 78 
We're looking to find how many times 78 goes into 621945.

Going ahead to step 1:
78 can be fit into 6 0 times, resulting in a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (2) of the dividend behind the 6 and repeat the process: 62 / 78

On to step 2:
The number 78 fits into 62 0 times, leaving a remainder of 62.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 62 to get 62.
Grab the next digit (1) from the dividend, add it to 62, then carry on: 621 / 78

On to step 3:
If we divide 621 by 78, we get 7 and a remainder of 75.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtracting 546 from 621 leaves us with 75.
Fetch the next digit (9) from the dividend, attach it to 75 and continue: 759 / 78

Advancing to step 4:
If we divide 759 by 78, we get 9 and a remainder of 57.
The number 9 becomes the next digit in our result. 
Result so far: 79.0
If we subtract 702 from 759, we get 57.
Take the next digit (4) from the dividend and append it to 57, then repeat: 574 / 78

Going ahead to step 5:
574 divided by 78 is 7 with a remainder of 28.
Put 7 as the next digit of the answer. 
Result so far: 797.0
Subtract 546 from 574 to get 28.
Take the next digit (5) from the dividend and append it to 28, then repeat: 285 / 78

Advancing to step 6:
When dividing 285 by 78, we get 3 with a remainder of 51.
Write down 3 as next digit of the result. 
Result so far: 7973.0
The remainder is 51 after subtracting 234 from 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Advancing to step 7:
If we divide 510 by 78, we get 6 and a remainder of 42.
The number 6 becomes the next digit in our result. 
Result so far: 7973.6
If we subtract 468 from 510, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 8:
If we divide 420 by 78, we get 5 and a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 7973.65
If we take 390 away from 420, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 9:
When dividing 300 by 78, we get 3 with a remainder of 66.
Write down 3 as next digit of the result. 
Result so far: 7973.653
Deduct 234 from 300 and we're left with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Going ahead to step 10:
660 divided by 78 is 8 with a remainder of 36.
The number 8 becomes the next digit in our result. 
Result so far: 7973.6538
Subtracting 624 from 660 leaves us 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.

Moving on to step 11:
If we divide 360 by 78, we get 4 and a remainder of 48.
Record the quotient 4 as the next digit in the result. 
Result so far: 7973.65384
Deduct 312 from 360 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.

Going ahead to step 12:
78 goes into 480 6 times with a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 7973.653846
If we take 468 away from 480, we end up 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:
The number 78 fits into 120 1 times, leaving a remainder of 42.
The next digit of our result is 1. 
Result so far: 7973.6538461
If we subtract 78 from 120, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 14:
When dividing 420 by 78, we get 5 with a remainder of 30.
The number 5 becomes the next digit in our result. 
Result so far: 7973.65384615
The remainder is 30 after subtracting 390 from 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The quotient of the division is 7973.65384615, and the remainder is 3e-08.