76830436 ÷ 139 
Our goal is to divide 76830436 by 139.

Step 1:
The number 139 fits into 7 0 times, leaving a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Append the next digit (6) from the dividend to 7 and continue with: 76 / 139

Let's proceed to step 2:
139 goes into 76 0 times with a remainder of 76.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 76, we end up with 76.
Bring next digit (8) of the dividend behind the 76 and repeat the process: 768 / 139

On to step 3:
The number 139 fits into 768 5 times, leaving a remainder of 73.
Write down 5 as next digit of the result. 
Result so far: 5.0
Subtract 695 from 768 to get 73.
Grab the next digit (3) from the dividend, add it to 73, then carry on: 733 / 139

Going ahead to step 4:
139 goes into 733 5 times with a remainder of 38.
The next digit of our result is 5. 
Result so far: 55.0
If we subtract 695 from 733, we get 38.
Fetch the next digit (0) from the dividend, attach it to 38 and continue: 380 / 139

On to step 5:
139 goes into 380 2 times with a remainder of 102.
The number 2 becomes the next digit in our result. 
Result so far: 552.0
If we take 278 away from 380, we end up with 102.
Include the next digit (4) from the dividend after 102, then repeat: 1024 / 139

Moving on to step 6:
139 goes into 1024 7 times with a remainder of 51.
Use 7 as the next digit of our solution. 
Result so far: 5527.0
Subtract 973 from 1024 to get 51.
Append the next digit (3) from the dividend to 51 and continue with: 513 / 139

On to step 7:
139 goes into 513 3 times with a remainder of 96.
Record the quotient 3 as the next digit in the result. 
Result so far: 55273.0
Deduct 417 from 513 and we're left with 96.
Include the next digit (6) from the dividend after 96, then repeat: 966 / 139

Let's proceed to step 8:
139 goes into 966 6 times with a remainder of 132.
The next digit of our result is 6. 
Result so far: 552736.0
If we take 834 away from 966, we end up with 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Going ahead to step 9:
When dividing 1320 by 139, we get 9 with a remainder of 69.
Write down 9 as next digit of the result. 
Result so far: 552736.9
If we subtract 1251 from 1320, we get 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Moving on to step 10:
If we divide 690 by 139, we get 4 and a remainder of 134.
Put 4 as the next digit of the answer. 
Result so far: 552736.94
If we subtract 556 from 690, we get 134.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1340, and continue the process.

Step 11:
139 goes into 1340 9 times with a remainder of 89.
The number 9 becomes the next digit in our result. 
Result so far: 552736.949
Subtract 1251 from 1340 to get 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Moving on to step 12:
139 goes into 890 6 times with a remainder of 56.
Record the quotient 6 as the next digit in the result. 
Result so far: 552736.9496
Deduct 834 from 890 and we're left with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 13:
When dividing 560 by 139, we get 4 with a remainder of 4.
Put 4 as the next digit of the answer. 
Result so far: 552736.94964
If we take 556 away from 560, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 14:
If we divide 40 by 139, we get 0 and a remainder of 40.
The next digit of our result is 0. 
Result so far: 552736.94964
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 15:
If we divide 400 by 139, we get 2 and a remainder of 122.
Write down 2 as next digit of the result. 
Result so far: 552736.9496402
Subtract 278 from 400 to get 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Let's proceed to step 16:
139 goes into 1220 8 times with a remainder of 108.
Use 8 as the next digit of our solution. 
Result so far: 552736.94964028
Subtracting 1112 from 1220 leaves us with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

The final outcome is 552736.94964028, with a leftover of 1.08e-07.