51729440 ÷ 858 
We want to figure out the number of times 51729440 can be divided by 858.

Going ahead to step 1:
When dividing 5 by 858, we get 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 858

Step 2:
858 goes into 51 0 times with a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 51 to get 51.
Bring next digit (7) of the dividend behind the 51 and repeat the process: 517 / 858

On to step 3:
When dividing 517 by 858, we get 0 with a remainder of 517.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 517 to get 517.
Grab the next digit (2) from the dividend, add it to 517, then carry on: 5172 / 858

Advancing to step 4:
858 goes into 5172 6 times with a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 6.0
The remainder is 24 after subtracting 5148 from 5172.
Append the next digit (9) from the dividend to 24 and continue with: 249 / 858

Advancing to step 5:
The number 858 fits into 249 0 times, leaving a remainder of 249.
The number 0 becomes the next digit in our result. 
Result so far: 60.0
If we subtract 0 from 249, we get 249.
Include the next digit (4) from the dividend after 249, then repeat: 2494 / 858

Moving on to step 6:
858 goes into 2494 2 times with a remainder of 778.
Use 2 as the next digit of our solution. 
Result so far: 602.0
If we subtract 1716 from 2494, we get 778.
Take the next digit (4) from the dividend and append it to 778, then repeat: 7784 / 858

Moving on to step 7:
If we divide 7784 by 858, we get 9 and a remainder of 62.
The number 9 becomes the next digit in our result. 
Result so far: 6029.0
Deduct 7722 from 7784 and we're left with 62.
Include the next digit (0) from the dividend after 62, then repeat: 620 / 858

Step 8:
When dividing 620 by 858, we get 0 with a remainder of 620.
The number 0 becomes the next digit in our result. 
Result so far: 60290.0
Subtract 0 from 620 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.

Advancing to step 9:
858 goes into 6200 7 times with a remainder of 194.
The number 7 becomes the next digit in our result. 
Result so far: 60290.7
The remainder is 194 after subtracting 6006 from 6200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

Step 10:
If we divide 1940 by 858, we get 2 and a remainder of 224.
Record the quotient 2 as the next digit in the result. 
Result so far: 60290.72
Subtract 1716 from 1940 to get 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Moving on to step 11:
2240 divided by 858 is 2 with a remainder of 524.
The next digit of our result is 2. 
Result so far: 60290.722
The remainder is 524 after subtracting 1716 from 2240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5240, and continue the process.

The quotient of the division is 60290.722, and the remainder is 0.0524.