We look at the division of 53879834 by 640 
We want to figure out the number of times 53879834 can be divided by 640.

Going ahead to step 1:
5 divided by 640 is 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Grab the next digit (3) from the dividend, add it to 5, then carry on: 53 / 640

On to step 2:
53 divided by 640 is 0 with a remainder of 53.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 53 leaves us with 53.
Append the next digit (8) from the dividend to 53 and continue with: 538 / 640

On to step 3:
The number 640 fits into 538 0 times, leaving a remainder of 538.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 538 and we're left with 538.
Take the next digit (7) from the dividend and append it to 538, then repeat: 5387 / 640

Advancing to step 4:
When dividing 5387 by 640, we get 8 with a remainder of 267.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Subtracting 5120 from 5387 leaves us with 267.
Append the next digit (9) from the dividend to 267 and continue with: 2679 / 640

Going ahead to step 5:
If we divide 2679 by 640, we get 4 and a remainder of 119.
The number 4 becomes the next digit in our result. 
Result so far: 84.0
If we take 2560 away from 2679, we end up with 119.
Fetch the next digit (8) from the dividend, attach it to 119 and continue: 1198 / 640

Moving on to step 6:
640 can be fit into 1198 1 times, resulting in a remainder of 558.
Record the quotient 1 as the next digit in the result. 
Result so far: 841.0
Subtracting 640 from 1198 leaves us with 558.
Append the next digit (3) from the dividend to 558 and continue with: 5583 / 640

Advancing to step 7:
If we divide 5583 by 640, we get 8 and a remainder of 463.
Write down 8 as next digit of the result. 
Result so far: 8418.0
Deduct 5120 from 5583 and we're left with 463.
Append the next digit (4) from the dividend to 463 and continue with: 4634 / 640

Step 8:
640 can be fit into 4634 7 times, resulting in a remainder of 154.
The next digit of our result is 7. 
Result so far: 84187.0
If we take 4480 away from 4634, we end up with 154.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1540, and continue the process.

Advancing to step 9:
When dividing 1540 by 640, we get 2 with a remainder of 260.
Record the quotient 2 as the next digit in the result. 
Result so far: 84187.2
Deduct 1280 from 1540 and we're left with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Moving on to step 10:
640 can be fit into 2600 4 times, resulting in a remainder of 40.
Put 4 as the next digit of the answer. 
Result so far: 84187.24
Deduct 2560 from 2600 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 11:
640 can be fit into 400 0 times, resulting in a remainder of 400.
The number 0 becomes the next digit in our result. 
Result so far: 84187.24
If we take 0 away from 400, we end up with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Going ahead to step 12:
640 can be fit into 4000 6 times, resulting in a remainder of 160.
The next digit of our result is 6. 
Result so far: 84187.2406
Deduct 3840 from 4000 and we're left with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 13:
1600 divided by 640 is 2 with a remainder of 320.
The next digit of our result is 2. 
Result so far: 84187.24062
Deduct 1280 from 1600 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.

On to step 14:
640 goes into 3200 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 84187.240625
Deduct 3200 from 3200 and we're left 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.

Going ahead to step 15:
When dividing 0 by 640, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 84187.240625
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 16:
The number 640 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 84187.240625
Subtract 0 from 0 to 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.

After the division, we end up with 84187.240625 and a remainder of 0.0.