644079 divided by 87 
We're looking to find how many times 87 goes into 644079.

Let's proceed to step 1:
87 goes into 6 0 times with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 87

Going ahead to step 2:
87 can be fit into 64 0 times, resulting in a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Take the next digit (4) from the dividend and append it to 64, then repeat: 644 / 87

Advancing to step 3:
If we divide 644 by 87, we get 7 and a remainder of 35.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtracting 609 from 644 leaves us with 35.
Append the next digit (0) from the dividend to 35 and continue with: 350 / 87

Going ahead to step 4:
When dividing 350 by 87, we get 4 with a remainder of 2.
The next digit of our result is 4. 
Result so far: 74.0
Deduct 348 from 350 and we're left with 2.
Append the next digit (7) from the dividend to 2 and continue with: 27 / 87

Going ahead to step 5:
87 can be fit into 27 0 times, resulting in a remainder of 27.
Put 0 as the next digit of the answer. 
Result so far: 740.0
Deduct 0 from 27 and we're left with 27.
Grab the next digit (9) from the dividend, add it to 27, then carry on: 279 / 87

Moving on to step 6:
If we divide 279 by 87, we get 3 and a remainder of 18.
The next digit of our result is 3. 
Result so far: 7403.0
Deduct 261 from 279 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 7:
87 goes into 180 2 times with a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 7403.2
If we subtract 174 from 180, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 8:
60 divided by 87 is 0 with a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 7403.2
Subtract 0 from 60 to get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 9:
The number 87 fits into 600 6 times, leaving a remainder of 78.
The number 6 becomes the next digit in our result. 
Result so far: 7403.206
If we take 522 away from 600, we end up with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Let's proceed to step 10:
When dividing 780 by 87, we get 8 with a remainder of 84.
The number 8 becomes the next digit in our result. 
Result so far: 7403.2068
Deduct 696 from 780 and we're left with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Step 11:
87 goes into 840 9 times with a remainder of 57.
Use 9 as the next digit of our solution. 
Result so far: 7403.20689
Subtracting 783 from 840 leaves us with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Step 12:
570 divided by 87 is 6 with a remainder of 48.
Record the quotient 6 as the next digit in the result. 
Result so far: 7403.206896
Deduct 522 from 570 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 13:
87 goes into 480 5 times with a remainder of 45.
The number 5 becomes the next digit in our result. 
Result so far: 7403.2068965
Subtracting 435 from 480 leaves us with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

On to step 14:
450 divided by 87 is 5 with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 7403.20689655
The remainder is 15 after subtracting 435 from 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

In conclusion, the division gives 7403.20689655 with a balance of 1.5e-08.