81587483 divided by 642 
Let's see how many times 642 fits into 81587483.

Step 1:
When dividing 8 by 642, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 642

Let's proceed to step 2:
If we divide 81 by 642, we get 0 and a remainder of 81.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 81, we end up with 81.
Bring next digit (5) of the dividend behind the 81 and repeat the process: 815 / 642

Advancing to step 3:
642 goes into 815 1 times with a remainder of 173.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 642 from 815, we get 173.
Append the next digit (8) from the dividend to 173 and continue with: 1738 / 642

Going ahead to step 4:
If we divide 1738 by 642, we get 2 and a remainder of 454.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
The remainder is 454 after subtracting 1284 from 1738.
Include the next digit (7) from the dividend after 454, then repeat: 4547 / 642

On to step 5:
642 can be fit into 4547 7 times, resulting in a remainder of 53.
Use 7 as the next digit of our solution. 
Result so far: 127.0
If we take 4494 away from 4547, we end up with 53.
Append the next digit (4) from the dividend to 53 and continue with: 534 / 642

Advancing to step 6:
642 goes into 534 0 times with a remainder of 534.
Record the quotient 0 as the next digit in the result. 
Result so far: 1270.0
If we take 0 away from 534, we end up with 534.
Bring next digit (8) of the dividend behind the 534 and repeat the process: 5348 / 642

Let's proceed to step 7:
When dividing 5348 by 642, we get 8 with a remainder of 212.
Write down 8 as next digit of the result. 
Result so far: 12708.0
If we take 5136 away from 5348, we end up with 212.
Grab the next digit (3) from the dividend, add it to 212, then carry on: 2123 / 642

Let's proceed to step 8:
642 can be fit into 2123 3 times, resulting in a remainder of 197.
Write down 3 as next digit of the result. 
Result so far: 127083.0
If we subtract 1926 from 2123, we get 197.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1970, and continue the process.

Going ahead to step 9:
When dividing 1970 by 642, we get 3 with a remainder of 44.
Write down 3 as next digit of the result. 
Result so far: 127083.3
The remainder is 44 after subtracting 1926 from 1970.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Moving on to step 10:
If we divide 440 by 642, we get 0 and a remainder of 440.
Write down 0 as next digit of the result. 
Result so far: 127083.3
Subtract 0 from 440 to get 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Going ahead to step 11:
When dividing 4400 by 642, we get 6 with a remainder of 548.
Record the quotient 6 as the next digit in the result. 
Result so far: 127083.306
Subtract 3852 from 4400 to get 548.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5480, and continue the process.

Step 12:
642 can be fit into 5480 8 times, resulting in a remainder of 344.
The number 8 becomes the next digit in our result. 
Result so far: 127083.3068
If we take 5136 away from 5480, we end up with 344.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

Going ahead to step 13:
642 can be fit into 3440 5 times, resulting in a remainder of 230.
Use 5 as the next digit of our solution. 
Result so far: 127083.30685
If we subtract 3210 from 3440, we get 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Advancing to step 14:
When dividing 2300 by 642, we get 3 with a remainder of 374.
The number 3 becomes the next digit in our result. 
Result so far: 127083.306853
If we subtract 1926 from 2300, we get 374.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3740, and continue the process.

Moving on to step 15:
3740 divided by 642 is 5 with a remainder of 530.
Put 5 as the next digit of the answer. 
Result so far: 127083.3068535
Subtract 3210 from 3740 to get 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5300, and continue the process.

Let's proceed to step 16:
The number 642 fits into 5300 8 times, leaving a remainder of 164.
Write down 8 as next digit of the result. 
Result so far: 127083.30685358
If we subtract 5136 from 5300, we get 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Our division results in 127083.30685358 with a remaining 1.64e-07.