51215059 ÷ 749 
We want to figure out the number of times 51215059 can be divided by 749.

Advancing to step 1:
When dividing 5 by 749, we get 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 749

Advancing to step 2:
The number 749 fits into 51 0 times, leaving a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Take the next digit (2) from the dividend and append it to 51, then repeat: 512 / 749

Let's proceed to step 3:
749 can be fit into 512 0 times, resulting in a remainder of 512.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 512 after subtracting 0 from 512.
Append the next digit (1) from the dividend to 512 and continue with: 5121 / 749

Moving on to step 4:
When dividing 5121 by 749, we get 6 with a remainder of 627.
Put 6 as the next digit of the answer. 
Result so far: 6.0
If we subtract 4494 from 5121, we get 627.
Bring next digit (5) of the dividend behind the 627 and repeat the process: 6275 / 749

On to step 5:
The number 749 fits into 6275 8 times, leaving a remainder of 283.
Use 8 as the next digit of our solution. 
Result so far: 68.0
If we take 5992 away from 6275, we end up with 283.
Append the next digit (0) from the dividend to 283 and continue with: 2830 / 749

Going ahead to step 6:
749 can be fit into 2830 3 times, resulting in a remainder of 583.
Put 3 as the next digit of the answer. 
Result so far: 683.0
The remainder is 583 after subtracting 2247 from 2830.
Include the next digit (5) from the dividend after 583, then repeat: 5835 / 749

Advancing to step 7:
When dividing 5835 by 749, we get 7 with a remainder of 592.
Write down 7 as next digit of the result. 
Result so far: 6837.0
If we subtract 5243 from 5835, we get 592.
Append the next digit (9) from the dividend to 592 and continue with: 5929 / 749

Going ahead to step 8:
749 can be fit into 5929 7 times, resulting in a remainder of 686.
The next digit of our result is 7. 
Result so far: 68377.0
If we take 5243 away from 5929, we end up with 686.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6860, and continue the process.

Step 9:
When dividing 6860 by 749, we get 9 with a remainder of 119.
Put 9 as the next digit of the answer. 
Result so far: 68377.9
The remainder is 119 after subtracting 6741 from 6860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1190, and continue the process.

Going ahead to step 10:
When dividing 1190 by 749, we get 1 with a remainder of 441.
The number 1 becomes the next digit in our result. 
Result so far: 68377.91
Subtract 749 from 1190 to get 441.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4410, and continue the process.

Step 11:
749 can be fit into 4410 5 times, resulting in a remainder of 665.
The next digit of our result is 5. 
Result so far: 68377.915
If we subtract 3745 from 4410, we get 665.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6650, and continue the process.

Moving on to step 12:
749 goes into 6650 8 times with a remainder of 658.
Use 8 as the next digit of our solution. 
Result so far: 68377.9158
The remainder is 658 after subtracting 5992 from 6650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6580, and continue the process.

Let's proceed to step 13:
If we divide 6580 by 749, we get 8 and a remainder of 588.
Use 8 as the next digit of our solution. 
Result so far: 68377.91588
Deduct 5992 from 6580 and we're left with 588.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5880, and continue the process.

The final outcome is 68377.91588, with a leftover of 0.000588.