Let's divide 678390 by 53
We want to figure out the number of times 678390 can be divided by 53.

Step 1:
6 divided by 53 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (7) from the dividend and append it to 6, then repeat: 67 / 53

On to step 2:
67 divided by 53 is 1 with a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 53 from 67 and we're left with 14.
Bring next digit (8) of the dividend behind the 14 and repeat the process: 148 / 53

On to step 3:
If we divide 148 by 53, we get 2 and a remainder of 42.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
Subtracting 106 from 148 leaves us with 42.
Bring next digit (3) of the dividend behind the 42 and repeat the process: 423 / 53

Moving on to step 4:
53 can be fit into 423 7 times, resulting in a remainder of 52.
Put 7 as the next digit of the answer. 
Result so far: 127.0
Deduct 371 from 423 and we're left with 52.
Bring next digit (9) of the dividend behind the 52 and repeat the process: 529 / 53

On to step 5:
53 can be fit into 529 9 times, resulting in a remainder of 52.
Use 9 as the next digit of our solution. 
Result so far: 1279.0
Subtract 477 from 529 to get 52.
Append the next digit (0) from the dividend to 52 and continue with: 520 / 53

Advancing to step 6:
53 goes into 520 9 times with a remainder of 43.
Write down 9 as next digit of the result. 
Result so far: 12799.0
The remainder is 43 after subtracting 477 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Moving on to step 7:
The number 53 fits into 430 8 times, leaving a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 12799.8
Subtracting 424 from 430 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 8:
When dividing 60 by 53, we get 1 with a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 12799.81
Deduct 53 from 60 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 9:
70 divided by 53 is 1 with a remainder of 17.
The number 1 becomes the next digit in our result. 
Result so far: 12799.811
Subtracting 53 from 70 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

The final result is 12799.811 with a remainder of 0.0017.