Let's divide 663121 by 87
We want to figure out the number of times 663121 can be divided by 87.

Moving on to step 1:
When dividing 6 by 87, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 87

Advancing to step 2:
66 divided by 87 is 0 with a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Bring next digit (3) of the dividend behind the 66 and repeat the process: 663 / 87

Let's proceed to step 3:
87 goes into 663 7 times with a remainder of 54.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtracting 609 from 663 leaves us with 54.
Take the next digit (1) from the dividend and append it to 54, then repeat: 541 / 87

Advancing to step 4:
If we divide 541 by 87, we get 6 and a remainder of 19.
Put 6 as the next digit of the answer. 
Result so far: 76.0
If we subtract 522 from 541, we get 19.
Grab the next digit (2) from the dividend, add it to 19, then carry on: 192 / 87

Let's proceed to step 5:
When dividing 192 by 87, we get 2 with a remainder of 18.
The next digit of our result is 2. 
Result so far: 762.0
Subtracting 174 from 192 leaves us with 18.
Take the next digit (1) from the dividend and append it to 18, then repeat: 181 / 87

Moving on to step 6:
87 goes into 181 2 times with a remainder of 7.
The next digit of our result is 2. 
Result so far: 7622.0
Deduct 174 from 181 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 7:
When dividing 70 by 87, we get 0 with a remainder of 70.
Record the quotient 0 as the next digit in the result. 
Result so far: 7622.0
Subtract 0 from 70 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 8:
If we divide 700 by 87, we get 8 and a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 7622.08
If we subtract 696 from 700, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 9:
The number 87 fits into 40 0 times, leaving a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 7622.08
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 10:
87 can be fit into 400 4 times, resulting in a remainder of 52.
Use 4 as the next digit of our solution. 
Result so far: 7622.0804
Subtract 348 from 400 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 11:
The number 87 fits into 520 5 times, leaving a remainder of 85.
The number 5 becomes the next digit in our result. 
Result so far: 7622.08045
The remainder is 85 after subtracting 435 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Step 12:
The number 87 fits into 850 9 times, leaving a remainder of 67.
Put 9 as the next digit of the answer. 
Result so far: 7622.080459
Deduct 783 from 850 and we're left with 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Going ahead to step 13:
670 divided by 87 is 7 with a remainder of 61.
Write down 7 as next digit of the result. 
Result so far: 7622.0804597
Deduct 609 from 670 and we're left with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 14:
87 goes into 610 7 times with a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 7622.08045977
If we subtract 609 from 610, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final result is 7622.08045977 with a remainder of 1e-09.