51735997 ÷ 648 
We want to figure out the number of times 51735997 can be divided by 648.

Moving on to step 1:
5 divided by 648 is 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 648

Let's proceed to step 2:
51 divided by 648 is 0 with a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 51 and we're left with 51.
Append the next digit (7) from the dividend to 51 and continue with: 517 / 648

Advancing to step 3:
517 divided by 648 is 0 with a remainder of 517.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 517 to get 517.
Grab the next digit (3) from the dividend, add it to 517, then carry on: 5173 / 648

Advancing to step 4:
5173 divided by 648 is 7 with a remainder of 637.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtracting 4536 from 5173 leaves us with 637.
Grab the next digit (5) from the dividend, add it to 637, then carry on: 6375 / 648

Step 5:
648 can be fit into 6375 9 times, resulting in a remainder of 543.
Write down 9 as next digit of the result. 
Result so far: 79.0
The remainder is 543 after subtracting 5832 from 6375.
Include the next digit (9) from the dividend after 543, then repeat: 5439 / 648

Moving on to step 6:
The number 648 fits into 5439 8 times, leaving a remainder of 255.
Use 8 as the next digit of our solution. 
Result so far: 798.0
Deduct 5184 from 5439 and we're left with 255.
Grab the next digit (9) from the dividend, add it to 255, then carry on: 2559 / 648

Moving on to step 7:
If we divide 2559 by 648, we get 3 and a remainder of 615.
Put 3 as the next digit of the answer. 
Result so far: 7983.0
Subtracting 1944 from 2559 leaves us with 615.
Append the next digit (7) from the dividend to 615 and continue with: 6157 / 648

Going ahead to step 8:
When dividing 6157 by 648, we get 9 with a remainder of 325.
The number 9 becomes the next digit in our result. 
Result so far: 79839.0
Deduct 5832 from 6157 and we're left with 325.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

Going ahead to step 9:
When dividing 3250 by 648, we get 5 with a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 79839.5
The remainder is 10 after subtracting 3240 from 3250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 10:
100 divided by 648 is 0 with a remainder of 100.
The number 0 becomes the next digit in our result. 
Result so far: 79839.5
The remainder is 100 after subtracting 0 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Advancing to step 11:
648 goes into 1000 1 times with a remainder of 352.
Write down 1 as next digit of the result. 
Result so far: 79839.501
The remainder is 352 after subtracting 648 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

Step 12:
648 goes into 3520 5 times with a remainder of 280.
Use 5 as the next digit of our solution. 
Result so far: 79839.5015
Subtract 3240 from 3520 to get 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Advancing to step 13:
648 goes into 2800 4 times with a remainder of 208.
The number 4 becomes the next digit in our result. 
Result so far: 79839.50154
Deduct 2592 from 2800 and we're left with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Moving on to step 14:
648 can be fit into 2080 3 times, resulting in a remainder of 136.
Write down 3 as next digit of the result. 
Result so far: 79839.501543
Subtracting 1944 from 2080 leaves us with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Advancing to step 15:
If we divide 1360 by 648, we get 2 and a remainder of 64.
Use 2 as the next digit of our solution. 
Result so far: 79839.5015432
The remainder is 64 after subtracting 1296 from 1360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Let's proceed to step 16:
640 divided by 648 is 0 with a remainder of 640.
Record the quotient 0 as the next digit in the result. 
Result so far: 79839.5015432
Subtract 0 from 640 to get 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

The quotient of the division is 79839.5015432, and the remainder is 6.4e-07.