We look at the division of 71731051 by 640 
Let's see how many times 640 fits into 71731051.

Step 1:
The number 640 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.
Grab the next digit (1) from the dividend, add it to 7, then carry on: 71 / 640

Step 2:
71 divided by 640 is 0 with a remainder of 71.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 71, we end up with 71.
Append the next digit (7) from the dividend to 71 and continue with: 717 / 640

Going ahead to step 3:
When dividing 717 by 640, we get 1 with a remainder of 77.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 640 from 717 and we're left with 77.
Fetch the next digit (3) from the dividend, attach it to 77 and continue: 773 / 640

Going ahead to step 4:
When dividing 773 by 640, we get 1 with a remainder of 133.
The next digit of our result is 1. 
Result so far: 11.0
If we take 640 away from 773, we end up with 133.
Append the next digit (1) from the dividend to 133 and continue with: 1331 / 640

Let's proceed to step 5:
The number 640 fits into 1331 2 times, leaving a remainder of 51.
Put 2 as the next digit of the answer. 
Result so far: 112.0
If we take 1280 away from 1331, we end up with 51.
Bring next digit (0) of the dividend behind the 51 and repeat the process: 510 / 640

Advancing to step 6:
When dividing 510 by 640, we get 0 with a remainder of 510.
The next digit of our result is 0. 
Result so far: 1120.0
The remainder is 510 after subtracting 0 from 510.
Take the next digit (5) from the dividend and append it to 510, then repeat: 5105 / 640

Step 7:
5105 divided by 640 is 7 with a remainder of 625.
The next digit of our result is 7. 
Result so far: 11207.0
The remainder is 625 after subtracting 4480 from 5105.
Bring next digit (1) of the dividend behind the 625 and repeat the process: 6251 / 640

On to step 8:
640 goes into 6251 9 times with a remainder of 491.
The number 9 becomes the next digit in our result. 
Result so far: 112079.0
Subtracting 5760 from 6251 leaves us with 491.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4910, and continue the process.

Step 9:
When dividing 4910 by 640, we get 7 with a remainder of 430.
Record the quotient 7 as the next digit in the result. 
Result so far: 112079.7
If we take 4480 away from 4910, we end up with 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

On to step 10:
640 can be fit into 4300 6 times, resulting in a remainder of 460.
Use 6 as the next digit of our solution. 
Result so far: 112079.76
If we subtract 3840 from 4300, we get 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Going ahead to step 11:
640 can be fit into 4600 7 times, resulting in a remainder of 120.
Record the quotient 7 as the next digit in the result. 
Result so far: 112079.767
The remainder is 120 after subtracting 4480 from 4600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Going ahead to step 12:
When dividing 1200 by 640, we get 1 with a remainder of 560.
The next digit of our result is 1. 
Result so far: 112079.7671
If we take 640 away from 1200, we end up with 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Going ahead to step 13:
640 goes into 5600 8 times with a remainder of 480.
Write down 8 as next digit of the result. 
Result so far: 112079.76718
If we subtract 5120 from 5600, we get 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

On to step 14:
640 goes into 4800 7 times with a remainder of 320.
The next digit of our result is 7. 
Result so far: 112079.767187
Deduct 4480 from 4800 and we're left with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Advancing to step 15:
3200 divided by 640 is 5 with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 112079.7671875
If we take 3200 away from 3200, 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.

Advancing to step 16:
0 divided by 640 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 112079.7671875
Subtracting 0 from 0 leaves us 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 quotient of the division is 112079.7671875, and the remainder is 0.0.