51585689 ÷ 425 
Let's see how many times 425 fits into 51585689.

Step 1:
The number 425 fits into 5 0 times, leaving a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 425

On to step 2:
425 can be fit into 51 0 times, resulting in a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Bring next digit (5) of the dividend behind the 51 and repeat the process: 515 / 425

Moving on to step 3:
425 can be fit into 515 1 times, resulting in a remainder of 90.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 425 from 515, we get 90.
Take the next digit (8) from the dividend and append it to 90, then repeat: 908 / 425

Going ahead to step 4:
908 divided by 425 is 2 with a remainder of 58.
Write down 2 as next digit of the result. 
Result so far: 12.0
If we subtract 850 from 908, we get 58.
Take the next digit (5) from the dividend and append it to 58, then repeat: 585 / 425

Let's proceed to step 5:
425 can be fit into 585 1 times, resulting in a remainder of 160.
Use 1 as the next digit of our solution. 
Result so far: 121.0
Deduct 425 from 585 and we're left with 160.
Take the next digit (6) from the dividend and append it to 160, then repeat: 1606 / 425

Moving on to step 6:
425 can be fit into 1606 3 times, resulting in a remainder of 331.
Write down 3 as next digit of the result. 
Result so far: 1213.0
The remainder is 331 after subtracting 1275 from 1606.
Grab the next digit (8) from the dividend, add it to 331, then carry on: 3318 / 425

On to step 7:
The number 425 fits into 3318 7 times, leaving a remainder of 343.
Record the quotient 7 as the next digit in the result. 
Result so far: 12137.0
If we take 2975 away from 3318, we end up with 343.
Take the next digit (9) from the dividend and append it to 343, then repeat: 3439 / 425

On to step 8:
425 can be fit into 3439 8 times, resulting in a remainder of 39.
The next digit of our result is 8. 
Result so far: 121378.0
If we take 3400 away from 3439, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Going ahead to step 9:
390 divided by 425 is 0 with a remainder of 390.
Use 0 as the next digit of our solution. 
Result so far: 121378.0
If we take 0 away from 390, we end up with 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Let's proceed to step 10:
425 goes into 3900 9 times with a remainder of 75.
The next digit of our result is 9. 
Result so far: 121378.09
If we subtract 3825 from 3900, we get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

On to step 11:
425 goes into 750 1 times with a remainder of 325.
Write down 1 as next digit of the result. 
Result so far: 121378.091
Deduct 425 from 750 and we're left with 325.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

Going ahead to step 12:
425 can be fit into 3250 7 times, resulting in a remainder of 275.
Record the quotient 7 as the next digit in the result. 
Result so far: 121378.0917
Subtract 2975 from 3250 to get 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

On to step 13:
The number 425 fits into 2750 6 times, leaving a remainder of 200.
Use 6 as the next digit of our solution. 
Result so far: 121378.09176
Deduct 2550 from 2750 and we're left with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 14:
If we divide 2000 by 425, we get 4 and a remainder of 300.
Record the quotient 4 as the next digit in the result. 
Result so far: 121378.091764
If we take 1700 away from 2000, we end up with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Going ahead to step 15:
The number 425 fits into 3000 7 times, leaving a remainder of 25.
The number 7 becomes the next digit in our result. 
Result so far: 121378.0917647
If we subtract 2975 from 3000, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 16:
250 divided by 425 is 0 with a remainder of 250.
Use 0 as the next digit of our solution. 
Result so far: 121378.0917647
Subtract 0 from 250 to get 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

The final result is 121378.0917647 with a remainder of 2.5e-07.