We're dividing 51043697 by 780 
We want to figure out the number of times 51043697 can be divided by 780.

On to step 1:
The number 780 fits into 5 0 times, leaving a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 780

Moving on to step 2:
When dividing 51 by 780, we get 0 with a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Bring next digit (0) of the dividend behind the 51 and repeat the process: 510 / 780

On to step 3:
When dividing 510 by 780, we get 0 with a remainder of 510.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 510 leaves us with 510.
Append the next digit (4) from the dividend to 510 and continue with: 5104 / 780

Going ahead to step 4:
780 goes into 5104 6 times with a remainder of 424.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Deduct 4680 from 5104 and we're left with 424.
Fetch the next digit (3) from the dividend, attach it to 424 and continue: 4243 / 780

On to step 5:
When dividing 4243 by 780, we get 5 with a remainder of 343.
The next digit of our result is 5. 
Result so far: 65.0
If we take 3900 away from 4243, we end up with 343.
Take the next digit (6) from the dividend and append it to 343, then repeat: 3436 / 780

Moving on to step 6:
When dividing 3436 by 780, we get 4 with a remainder of 316.
The number 4 becomes the next digit in our result. 
Result so far: 654.0
Subtract 3120 from 3436 to get 316.
Grab the next digit (9) from the dividend, add it to 316, then carry on: 3169 / 780

On to step 7:
3169 divided by 780 is 4 with a remainder of 49.
Record the quotient 4 as the next digit in the result. 
Result so far: 6544.0
If we take 3120 away from 3169, we end up with 49.
Bring next digit (7) of the dividend behind the 49 and repeat the process: 497 / 780

Moving on to step 8:
780 goes into 497 0 times with a remainder of 497.
Write down 0 as next digit of the result. 
Result so far: 65440.0
If we take 0 away from 497, we end up with 497.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4970, and continue the process.

Advancing to step 9:
780 goes into 4970 6 times with a remainder of 290.
Use 6 as the next digit of our solution. 
Result so far: 65440.6
If we subtract 4680 from 4970, we get 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Let's proceed to step 10:
780 goes into 2900 3 times with a remainder of 560.
Write down 3 as next digit of the result. 
Result so far: 65440.63
If we take 2340 away from 2900, we end up with 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

On to step 11:
The number 780 fits into 5600 7 times, leaving a remainder of 140.
Use 7 as the next digit of our solution. 
Result so far: 65440.637
The remainder is 140 after subtracting 5460 from 5600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

On to step 12:
The number 780 fits into 1400 1 times, leaving a remainder of 620.
Record the quotient 1 as the next digit in the result. 
Result so far: 65440.6371
Subtract 780 from 1400 to get 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

On to step 13:
When dividing 6200 by 780, we get 7 with a remainder of 740.
Use 7 as the next digit of our solution. 
Result so far: 65440.63717
Subtract 5460 from 6200 to get 740.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7400, and continue the process.

On to step 14:
When dividing 7400 by 780, we get 9 with a remainder of 380.
Write down 9 as next digit of the result. 
Result so far: 65440.637179
If we subtract 7020 from 7400, we get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Going ahead to step 15:
780 can be fit into 3800 4 times, resulting in a remainder of 680.
Write down 4 as next digit of the result. 
Result so far: 65440.6371794
Subtract 3120 from 3800 to get 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

Step 16:
780 goes into 6800 8 times with a remainder of 560.
Put 8 as the next digit of the answer. 
Result so far: 65440.63717948
If we subtract 6240 from 6800, we get 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

The final result is 65440.63717948 with a remainder of 5.6e-07.