We look at the division of 51611251 by 820 
Let's see how many times 820 fits into 51611251.

Let's proceed to step 1:
820 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 820

Moving on to step 2:
The number 820 fits into 51 0 times, leaving a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 51 and we're left with 51.
Grab the next digit (6) from the dividend, add it to 51, then carry on: 516 / 820

Step 3:
820 goes into 516 0 times with a remainder of 516.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 516, we end up with 516.
Append the next digit (1) from the dividend to 516 and continue with: 5161 / 820

Moving on to step 4:
If we divide 5161 by 820, we get 6 and a remainder of 241.
The next digit of our result is 6. 
Result so far: 6.0
Subtract 4920 from 5161 to get 241.
Append the next digit (1) from the dividend to 241 and continue with: 2411 / 820

Going ahead to step 5:
If we divide 2411 by 820, we get 2 and a remainder of 771.
The next digit of our result is 2. 
Result so far: 62.0
The remainder is 771 after subtracting 1640 from 2411.
Grab the next digit (2) from the dividend, add it to 771, then carry on: 7712 / 820

Step 6:
820 can be fit into 7712 9 times, resulting in a remainder of 332.
The number 9 becomes the next digit in our result. 
Result so far: 629.0
If we subtract 7380 from 7712, we get 332.
Append the next digit (5) from the dividend to 332 and continue with: 3325 / 820

Advancing to step 7:
820 can be fit into 3325 4 times, resulting in a remainder of 45.
Write down 4 as next digit of the result. 
Result so far: 6294.0
If we take 3280 away from 3325, we end up with 45.
Take the next digit (1) from the dividend and append it to 45, then repeat: 451 / 820

On to step 8:
The number 820 fits into 451 0 times, leaving a remainder of 451.
Record the quotient 0 as the next digit in the result. 
Result so far: 62940.0
Subtracting 0 from 451 leaves us with 451.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4510, and continue the process.

Advancing to step 9:
When dividing 4510 by 820, we get 5 with a remainder of 410.
Write down 5 as next digit of the result. 
Result so far: 62940.5
The remainder is 410 after subtracting 4100 from 4510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

Going ahead to step 10:
820 can be fit into 4100 5 times, resulting in a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 62940.55
If we take 4100 away from 4100, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 62940.55 with a remainder of 0.0.