51121631 ÷ 975 
We're looking to find how many times 975 goes into 51121631.

Advancing to step 1:
When dividing 5 by 975, we get 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 975

Step 2:
The number 975 fits into 51 0 times, leaving a remainder of 51.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Take the next digit (1) from the dividend and append it to 51, then repeat: 511 / 975

On to step 3:
The number 975 fits into 511 0 times, leaving a remainder of 511.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 511 and we're left with 511.
Grab the next digit (2) from the dividend, add it to 511, then carry on: 5112 / 975

Let's proceed to step 4:
When dividing 5112 by 975, we get 5 with a remainder of 237.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we take 4875 away from 5112, we end up with 237.
Take the next digit (1) from the dividend and append it to 237, then repeat: 2371 / 975

On to step 5:
975 can be fit into 2371 2 times, resulting in a remainder of 421.
Put 2 as the next digit of the answer. 
Result so far: 52.0
If we take 1950 away from 2371, we end up with 421.
Include the next digit (6) from the dividend after 421, then repeat: 4216 / 975

Advancing to step 6:
The number 975 fits into 4216 4 times, leaving a remainder of 316.
Use 4 as the next digit of our solution. 
Result so far: 524.0
Subtracting 3900 from 4216 leaves us with 316.
Append the next digit (3) from the dividend to 316 and continue with: 3163 / 975

Let's proceed to step 7:
975 can be fit into 3163 3 times, resulting in a remainder of 238.
Use 3 as the next digit of our solution. 
Result so far: 5243.0
If we take 2925 away from 3163, we end up with 238.
Take the next digit (1) from the dividend and append it to 238, then repeat: 2381 / 975

Let's proceed to step 8:
975 can be fit into 2381 2 times, resulting in a remainder of 431.
Write down 2 as next digit of the result. 
Result so far: 52432.0
Deduct 1950 from 2381 and we're left with 431.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4310, and continue the process.

On to step 9:
975 goes into 4310 4 times with a remainder of 410.
Put 4 as the next digit of the answer. 
Result so far: 52432.4
Deduct 3900 from 4310 and we're left with 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

Advancing to step 10:
The number 975 fits into 4100 4 times, leaving a remainder of 200.
Use 4 as the next digit of our solution. 
Result so far: 52432.44
If we take 3900 away from 4100, we end up 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.

The final outcome is 52432.44, with a leftover of 0.2.