87021977 divided by 648 
Let's see how many times 648 fits into 87021977.

Let's proceed to step 1:
When dividing 8 by 648, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 648

Let's proceed to step 2:
The number 648 fits into 87 0 times, leaving a remainder of 87.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 87 and we're left with 87.
Include the next digit (0) from the dividend after 87, then repeat: 870 / 648

On to step 3:
The number 648 fits into 870 1 times, leaving a remainder of 222.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 222 after subtracting 648 from 870.
Take the next digit (2) from the dividend and append it to 222, then repeat: 2222 / 648

Step 4:
If we divide 2222 by 648, we get 3 and a remainder of 278.
Use 3 as the next digit of our solution. 
Result so far: 13.0
If we take 1944 away from 2222, we end up with 278.
Grab the next digit (1) from the dividend, add it to 278, then carry on: 2781 / 648

Moving on to step 5:
2781 divided by 648 is 4 with a remainder of 189.
Record the quotient 4 as the next digit in the result. 
Result so far: 134.0
If we take 2592 away from 2781, we end up with 189.
Include the next digit (9) from the dividend after 189, then repeat: 1899 / 648

On to step 6:
If we divide 1899 by 648, we get 2 and a remainder of 603.
Put 2 as the next digit of the answer. 
Result so far: 1342.0
If we take 1296 away from 1899, we end up with 603.
Take the next digit (7) from the dividend and append it to 603, then repeat: 6037 / 648

Moving on to step 7:
If we divide 6037 by 648, we get 9 and a remainder of 205.
Put 9 as the next digit of the answer. 
Result so far: 13429.0
Deduct 5832 from 6037 and we're left with 205.
Take the next digit (7) from the dividend and append it to 205, then repeat: 2057 / 648

Advancing to step 8:
When dividing 2057 by 648, we get 3 with a remainder of 113.
Put 3 as the next digit of the answer. 
Result so far: 134293.0
Deduct 1944 from 2057 and we're left with 113.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1130, and continue the process.

On to step 9:
648 can be fit into 1130 1 times, resulting in a remainder of 482.
The number 1 becomes the next digit in our result. 
Result so far: 134293.1
If we subtract 648 from 1130, we get 482.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4820, and continue the process.

Advancing to step 10:
When dividing 4820 by 648, we get 7 with a remainder of 284.
Put 7 as the next digit of the answer. 
Result so far: 134293.17
If we take 4536 away from 4820, we end up with 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

Moving on to step 11:
2840 divided by 648 is 4 with a remainder of 248.
The next digit of our result is 4. 
Result so far: 134293.174
Subtract 2592 from 2840 to get 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Step 12:
The number 648 fits into 2480 3 times, leaving a remainder of 536.
Use 3 as the next digit of our solution. 
Result so far: 134293.1743
Subtract 1944 from 2480 to get 536.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5360, and continue the process.

Let's proceed to step 13:
5360 divided by 648 is 8 with a remainder of 176.
Put 8 as the next digit of the answer. 
Result so far: 134293.17438
If we subtract 5184 from 5360, we get 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Advancing to step 14:
1760 divided by 648 is 2 with a remainder of 464.
Use 2 as the next digit of our solution. 
Result so far: 134293.174382
Subtract 1296 from 1760 to get 464.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

Going ahead to step 15:
The number 648 fits into 4640 7 times, leaving a remainder of 104.
Put 7 as the next digit of the answer. 
Result so far: 134293.1743827
Subtract 4536 from 4640 to get 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Step 16:
If we divide 1040 by 648, we get 1 and a remainder of 392.
Use 1 as the next digit of our solution. 
Result so far: 134293.17438271
Deduct 648 from 1040 and we're left with 392.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3920, and continue the process.

After the division, we end up with 134293.17438271 and a remainder of 3.92e-07.