3345747 divided by 648 
The aim is to understand the frequency of 648 in 3345747.

On to step 1:
648 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Grab the next digit (3) from the dividend, add it to 3, then carry on: 33 / 648

Moving on to step 2:
33 divided by 648 is 0 with a remainder of 33.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 33 after subtracting 0 from 33.
Include the next digit (4) from the dividend after 33, then repeat: 334 / 648

Step 3:
648 can be fit into 334 0 times, resulting in a remainder of 334.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 334 to get 334.
Append the next digit (5) from the dividend to 334 and continue with: 3345 / 648

Advancing to step 4:
If we divide 3345 by 648, we get 5 and a remainder of 105.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we take 3240 away from 3345, we end up with 105.
Grab the next digit (7) from the dividend, add it to 105, then carry on: 1057 / 648

Going ahead to step 5:
If we divide 1057 by 648, we get 1 and a remainder of 409.
Put 1 as the next digit of the answer. 
Result so far: 51.0
If we subtract 648 from 1057, we get 409.
Include the next digit (4) from the dividend after 409, then repeat: 4094 / 648

Advancing to step 6:
648 goes into 4094 6 times with a remainder of 206.
The next digit of our result is 6. 
Result so far: 516.0
If we subtract 3888 from 4094, we get 206.
Fetch the next digit (7) from the dividend, attach it to 206 and continue: 2067 / 648

Moving on to step 7:
648 goes into 2067 3 times with a remainder of 123.
Record the quotient 3 as the next digit in the result. 
Result so far: 5163.0
Deduct 1944 from 2067 and we're left with 123.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1230, and continue the process.

Going ahead to step 8:
When dividing 1230 by 648, we get 1 with a remainder of 582.
Write down 1 as next digit of the result. 
Result so far: 5163.1
Subtracting 648 from 1230 leaves us with 582.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5820, and continue the process.

Going ahead to step 9:
If we divide 5820 by 648, we get 8 and a remainder of 636.
Write down 8 as next digit of the result. 
Result so far: 5163.18
If we take 5184 away from 5820, we end up with 636.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6360, and continue the process.

Advancing to step 10:
If we divide 6360 by 648, we get 9 and a remainder of 528.
Put 9 as the next digit of the answer. 
Result so far: 5163.189
Subtract 5832 from 6360 to get 528.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5280, and continue the process.

On to step 11:
648 can be fit into 5280 8 times, resulting in a remainder of 96.
Put 8 as the next digit of the answer. 
Result so far: 5163.1898
If we take 5184 away from 5280, we end up with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Moving on to step 12:
648 can be fit into 960 1 times, resulting in a remainder of 312.
Use 1 as the next digit of our solution. 
Result so far: 5163.18981
If we take 648 away from 960, we end up with 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Advancing to step 13:
When dividing 3120 by 648, we get 4 with a remainder of 528.
The next digit of our result is 4. 
Result so far: 5163.189814
Subtracting 2592 from 3120 leaves us with 528.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5280, and continue the process.

On to step 14:
The number 648 fits into 5280 8 times, leaving a remainder of 96.
The next digit of our result is 8. 
Result so far: 5163.1898148
If we subtract 5184 from 5280, we get 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Moving on to step 15:
648 goes into 960 1 times with a remainder of 312.
Use 1 as the next digit of our solution. 
Result so far: 5163.18981481
Subtracting 648 from 960 leaves us with 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

After the division, we end up with 5163.18981481 and a remainder of 3.12e-07.