We look at the division of 81394362 by 647 
We want to figure out the number of times 81394362 can be divided by 647.

Step 1:
647 goes into 8 0 times with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 647

Let's proceed to step 2:
When dividing 81 by 647, we get 0 with a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Include the next digit (3) from the dividend after 81, then repeat: 813 / 647

Going ahead to step 3:
When dividing 813 by 647, we get 1 with a remainder of 166.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 647 from 813 to get 166.
Include the next digit (9) from the dividend after 166, then repeat: 1669 / 647

Step 4:
1669 divided by 647 is 2 with a remainder of 375.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
If we take 1294 away from 1669, we end up with 375.
Fetch the next digit (4) from the dividend, attach it to 375 and continue: 3754 / 647

On to step 5:
When dividing 3754 by 647, we get 5 with a remainder of 519.
Write down 5 as next digit of the result. 
Result so far: 125.0
Subtracting 3235 from 3754 leaves us with 519.
Include the next digit (3) from the dividend after 519, then repeat: 5193 / 647

Let's proceed to step 6:
5193 divided by 647 is 8 with a remainder of 17.
The number 8 becomes the next digit in our result. 
Result so far: 1258.0
Subtracting 5176 from 5193 leaves us with 17.
Grab the next digit (6) from the dividend, add it to 17, then carry on: 176 / 647

Going ahead to step 7:
647 can be fit into 176 0 times, resulting in a remainder of 176.
Use 0 as the next digit of our solution. 
Result so far: 12580.0
Subtract 0 from 176 to get 176.
Include the next digit (2) from the dividend after 176, then repeat: 1762 / 647

On to step 8:
When dividing 1762 by 647, we get 2 with a remainder of 468.
Use 2 as the next digit of our solution. 
Result so far: 125802.0
Subtract 1294 from 1762 to get 468.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4680, and continue the process.

On to step 9:
If we divide 4680 by 647, we get 7 and a remainder of 151.
Put 7 as the next digit of the answer. 
Result so far: 125802.7
The remainder is 151 after subtracting 4529 from 4680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1510, and continue the process.

On to step 10:
The number 647 fits into 1510 2 times, leaving a remainder of 216.
Record the quotient 2 as the next digit in the result. 
Result so far: 125802.72
If we take 1294 away from 1510, we end up with 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Step 11:
647 can be fit into 2160 3 times, resulting in a remainder of 219.
The number 3 becomes the next digit in our result. 
Result so far: 125802.723
Subtract 1941 from 2160 to get 219.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2190, and continue the process.

Step 12:
The number 647 fits into 2190 3 times, leaving a remainder of 249.
Put 3 as the next digit of the answer. 
Result so far: 125802.7233
Deduct 1941 from 2190 and we're left with 249.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2490, and continue the process.

The quotient of the division is 125802.7233, and the remainder is 0.00249.