We divide 81006629 by 640
Let's see how many times 640 fits into 81006629.

Step 1:
When dividing 8 by 640, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 640

Let's proceed to step 2:
640 can be fit into 81 0 times, resulting in a remainder of 81.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Bring next digit (0) of the dividend behind the 81 and repeat the process: 810 / 640

On to step 3:
640 can be fit into 810 1 times, resulting in a remainder of 170.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 640 from 810, we get 170.
Include the next digit (0) from the dividend after 170, then repeat: 1700 / 640

On to step 4:
If we divide 1700 by 640, we get 2 and a remainder of 420.
Write down 2 as next digit of the result. 
Result so far: 12.0
If we take 1280 away from 1700, we end up with 420.
Grab the next digit (6) from the dividend, add it to 420, then carry on: 4206 / 640

Moving on to step 5:
640 goes into 4206 6 times with a remainder of 366.
Put 6 as the next digit of the answer. 
Result so far: 126.0
If we take 3840 away from 4206, we end up with 366.
Fetch the next digit (6) from the dividend, attach it to 366 and continue: 3666 / 640

On to step 6:
The number 640 fits into 3666 5 times, leaving a remainder of 466.
Use 5 as the next digit of our solution. 
Result so far: 1265.0
Deduct 3200 from 3666 and we're left with 466.
Take the next digit (2) from the dividend and append it to 466, then repeat: 4662 / 640

Moving on to step 7:
4662 divided by 640 is 7 with a remainder of 182.
The number 7 becomes the next digit in our result. 
Result so far: 12657.0
If we subtract 4480 from 4662, we get 182.
Fetch the next digit (9) from the dividend, attach it to 182 and continue: 1829 / 640

Moving on to step 8:
The number 640 fits into 1829 2 times, leaving a remainder of 549.
The number 2 becomes the next digit in our result. 
Result so far: 126572.0
Subtracting 1280 from 1829 leaves us with 549.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5490, and continue the process.

Going ahead to step 9:
5490 divided by 640 is 8 with a remainder of 370.
The number 8 becomes the next digit in our result. 
Result so far: 126572.8
If we take 5120 away from 5490, we end up with 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

On to step 10:
640 can be fit into 3700 5 times, resulting in a remainder of 500.
Put 5 as the next digit of the answer. 
Result so far: 126572.85
Subtract 3200 from 3700 to get 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

On to step 11:
5000 divided by 640 is 7 with a remainder of 520.
The next digit of our result is 7. 
Result so far: 126572.857
If we take 4480 away from 5000, we end up with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Step 12:
If we divide 5200 by 640, we get 8 and a remainder of 80.
The next digit of our result is 8. 
Result so far: 126572.8578
Subtract 5120 from 5200 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 13:
If we divide 800 by 640, we get 1 and a remainder of 160.
Put 1 as the next digit of the answer. 
Result so far: 126572.85781
If we subtract 640 from 800, we get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Advancing to step 14:
640 goes into 1600 2 times with a remainder of 320.
Record the quotient 2 as the next digit in the result. 
Result so far: 126572.857812
Subtract 1280 from 1600 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

On to step 15:
If we divide 3200 by 640, we get 5 and a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 126572.8578125
If we subtract 3200 from 3200, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 16:
The number 640 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 126572.8578125
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 126572.8578125, with a leftover of 0.0.