We divide 51025738 by 646
We want to figure out the number of times 51025738 can be divided by 646.

Let's proceed to step 1:
If we divide 5 by 646, we get 0 and a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 646

Advancing to step 2:
51 divided by 646 is 0 with a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Fetch the next digit (0) from the dividend, attach it to 51 and continue: 510 / 646

On to step 3:
When dividing 510 by 646, we get 0 with a remainder of 510.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 510 and we're left with 510.
Bring next digit (2) of the dividend behind the 510 and repeat the process: 5102 / 646

Advancing to step 4:
The number 646 fits into 5102 7 times, leaving a remainder of 580.
Use 7 as the next digit of our solution. 
Result so far: 7.0
The remainder is 580 after subtracting 4522 from 5102.
Include the next digit (5) from the dividend after 580, then repeat: 5805 / 646

Let's proceed to step 5:
If we divide 5805 by 646, we get 8 and a remainder of 637.
Use 8 as the next digit of our solution. 
Result so far: 78.0
If we take 5168 away from 5805, we end up with 637.
Bring next digit (7) of the dividend behind the 637 and repeat the process: 6377 / 646

Moving on to step 6:
The number 646 fits into 6377 9 times, leaving a remainder of 563.
Write down 9 as next digit of the result. 
Result so far: 789.0
Deduct 5814 from 6377 and we're left with 563.
Grab the next digit (3) from the dividend, add it to 563, then carry on: 5633 / 646

Moving on to step 7:
646 goes into 5633 8 times with a remainder of 465.
Use 8 as the next digit of our solution. 
Result so far: 7898.0
If we take 5168 away from 5633, we end up with 465.
Take the next digit (8) from the dividend and append it to 465, then repeat: 4658 / 646

On to step 8:
646 goes into 4658 7 times with a remainder of 136.
Write down 7 as next digit of the result. 
Result so far: 78987.0
Subtracting 4522 from 4658 leaves us with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Step 9:
646 can be fit into 1360 2 times, resulting in a remainder of 68.
Record the quotient 2 as the next digit in the result. 
Result so far: 78987.2
The remainder is 68 after subtracting 1292 from 1360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Going ahead to step 10:
The number 646 fits into 680 1 times, leaving a remainder of 34.
Put 1 as the next digit of the answer. 
Result so far: 78987.21
If we take 646 away from 680, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 11:
If we divide 340 by 646, we get 0 and a remainder of 340.
Use 0 as the next digit of our solution. 
Result so far: 78987.21
If we subtract 0 from 340, we get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Step 12:
3400 divided by 646 is 5 with a remainder of 170.
The next digit of our result is 5. 
Result so far: 78987.2105
Subtracting 3230 from 3400 leaves us with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

On to step 13:
646 can be fit into 1700 2 times, resulting in a remainder of 408.
Use 2 as the next digit of our solution. 
Result so far: 78987.21052
Subtract 1292 from 1700 to get 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

Let's proceed to step 14:
If we divide 4080 by 646, we get 6 and a remainder of 204.
The number 6 becomes the next digit in our result. 
Result so far: 78987.210526
If we take 3876 away from 4080, we end up with 204.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2040, and continue the process.

Advancing to step 15:
When dividing 2040 by 646, we get 3 with a remainder of 102.
Put 3 as the next digit of the answer. 
Result so far: 78987.2105263
If we subtract 1938 from 2040, we get 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Let's proceed to step 16:
When dividing 1020 by 646, we get 1 with a remainder of 374.
Write down 1 as next digit of the result. 
Result so far: 78987.21052631
Subtracting 646 from 1020 leaves us with 374.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3740, and continue the process.

Our division results in 78987.21052631 with a remaining 3.74e-07.