We look at the division of 53399524 by 780 
We want to figure out the number of times 53399524 can be divided by 780.

Let's proceed to step 1:
780 can be fit into 5 0 times, resulting in a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Grab the next digit (3) from the dividend, add it to 5, then carry on: 53 / 780

Step 2:
780 goes into 53 0 times with a remainder of 53.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 53 leaves us with 53.
Append the next digit (3) from the dividend to 53 and continue with: 533 / 780

Step 3:
533 divided by 780 is 0 with a remainder of 533.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 533 and we're left with 533.
Append the next digit (9) from the dividend to 533 and continue with: 5339 / 780

Advancing to step 4:
The number 780 fits into 5339 6 times, leaving a remainder of 659.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtract 4680 from 5339 to get 659.
Bring next digit (9) of the dividend behind the 659 and repeat the process: 6599 / 780

On to step 5:
If we divide 6599 by 780, we get 8 and a remainder of 359.
Use 8 as the next digit of our solution. 
Result so far: 68.0
Deduct 6240 from 6599 and we're left with 359.
Include the next digit (5) from the dividend after 359, then repeat: 3595 / 780

Step 6:
If we divide 3595 by 780, we get 4 and a remainder of 475.
Write down 4 as next digit of the result. 
Result so far: 684.0
If we take 3120 away from 3595, we end up with 475.
Take the next digit (2) from the dividend and append it to 475, then repeat: 4752 / 780

Step 7:
The number 780 fits into 4752 6 times, leaving a remainder of 72.
The number 6 becomes the next digit in our result. 
Result so far: 6846.0
Deduct 4680 from 4752 and we're left with 72.
Include the next digit (4) from the dividend after 72, then repeat: 724 / 780

Step 8:
780 can be fit into 724 0 times, resulting in a remainder of 724.
Write down 0 as next digit of the result. 
Result so far: 68460.0
Deduct 0 from 724 and we're left with 724.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7240, and continue the process.

On to step 9:
780 can be fit into 7240 9 times, resulting in a remainder of 220.
Put 9 as the next digit of the answer. 
Result so far: 68460.9
If we take 7020 away from 7240, we end up with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Let's proceed to step 10:
If we divide 2200 by 780, we get 2 and a remainder of 640.
Write down 2 as next digit of the result. 
Result so far: 68460.92
The remainder is 640 after subtracting 1560 from 2200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Let's proceed to step 11:
When dividing 6400 by 780, we get 8 with a remainder of 160.
Write down 8 as next digit of the result. 
Result so far: 68460.928
Deduct 6240 from 6400 and we're left with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Advancing to step 12:
If we divide 1600 by 780, we get 2 and a remainder of 40.
The next digit of our result is 2. 
Result so far: 68460.9282
The remainder is 40 after subtracting 1560 from 1600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 13:
If we divide 400 by 780, we get 0 and a remainder of 400.
Record the quotient 0 as the next digit in the result. 
Result so far: 68460.9282
Subtract 0 from 400 to get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

On to step 14:
The number 780 fits into 4000 5 times, leaving a remainder of 100.
Record the quotient 5 as the next digit in the result. 
Result so far: 68460.928205
If we subtract 3900 from 4000, we get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Going ahead to step 15:
The number 780 fits into 1000 1 times, leaving a remainder of 220.
The next digit of our result is 1. 
Result so far: 68460.9282051
Deduct 780 from 1000 and we're left with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Let's proceed to step 16:
780 goes into 2200 2 times with a remainder of 640.
Record the quotient 2 as the next digit in the result. 
Result so far: 68460.92820512
Deduct 1560 from 2200 and we're left with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

The final result is 68460.92820512 with a remainder of 6.4e-07.