82154978 ÷ 647 
We want to divide 82154978 by 647.

Step 1:
If we divide 8 by 647, we get 0 and a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (2) from the dividend, attach it to 8 and continue: 82 / 647

Advancing to step 2:
82 divided by 647 is 0 with a remainder of 82.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 82 after subtracting 0 from 82.
Append the next digit (1) from the dividend to 82 and continue with: 821 / 647

Going ahead to step 3:
821 divided by 647 is 1 with a remainder of 174.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 647 from 821 to get 174.
Grab the next digit (5) from the dividend, add it to 174, then carry on: 1745 / 647

Advancing to step 4:
When dividing 1745 by 647, we get 2 with a remainder of 451.
Put 2 as the next digit of the answer. 
Result so far: 12.0
If we take 1294 away from 1745, we end up with 451.
Bring next digit (4) of the dividend behind the 451 and repeat the process: 4514 / 647

Step 5:
If we divide 4514 by 647, we get 6 and a remainder of 632.
Record the quotient 6 as the next digit in the result. 
Result so far: 126.0
Subtracting 3882 from 4514 leaves us with 632.
Fetch the next digit (9) from the dividend, attach it to 632 and continue: 6329 / 647

Going ahead to step 6:
6329 divided by 647 is 9 with a remainder of 506.
Write down 9 as next digit of the result. 
Result so far: 1269.0
Subtracting 5823 from 6329 leaves us with 506.
Bring next digit (7) of the dividend behind the 506 and repeat the process: 5067 / 647

Advancing to step 7:
647 goes into 5067 7 times with a remainder of 538.
The number 7 becomes the next digit in our result. 
Result so far: 12697.0
The remainder is 538 after subtracting 4529 from 5067.
Include the next digit (8) from the dividend after 538, then repeat: 5388 / 647

Step 8:
647 can be fit into 5388 8 times, resulting in a remainder of 212.
The next digit of our result is 8. 
Result so far: 126978.0
If we subtract 5176 from 5388, we get 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

Moving on to step 9:
When dividing 2120 by 647, we get 3 with a remainder of 179.
The number 3 becomes the next digit in our result. 
Result so far: 126978.3
If we take 1941 away from 2120, we end up with 179.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1790, and continue the process.

Advancing to step 10:
The number 647 fits into 1790 2 times, leaving a remainder of 496.
Put 2 as the next digit of the answer. 
Result so far: 126978.32
Subtracting 1294 from 1790 leaves us with 496.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

Advancing to step 11:
If we divide 4960 by 647, we get 7 and a remainder of 431.
Record the quotient 7 as the next digit in the result. 
Result so far: 126978.327
Subtracting 4529 from 4960 leaves us 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.

Moving on to step 12:
647 goes into 4310 6 times with a remainder of 428.
Record the quotient 6 as the next digit in the result. 
Result so far: 126978.3276
Deduct 3882 from 4310 and we're left with 428.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

Going ahead to step 13:
If we divide 4280 by 647, we get 6 and a remainder of 398.
Record the quotient 6 as the next digit in the result. 
Result so far: 126978.32766
Subtracting 3882 from 4280 leaves us with 398.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

After the division, we end up with 126978.32766 and a remainder of 0.000398.