66835901 divided by 355 
The aim is to understand the frequency of 355 in 66835901.

Going ahead to step 1:
355 can be fit into 6 0 times, resulting in a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 355

Going ahead to step 2:
When dividing 66 by 355, we get 0 with a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Take the next digit (8) from the dividend and append it to 66, then repeat: 668 / 355

On to step 3:
355 goes into 668 1 times with a remainder of 313.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 355 from 668 leaves us with 313.
Bring next digit (3) of the dividend behind the 313 and repeat the process: 3133 / 355

Let's proceed to step 4:
355 goes into 3133 8 times with a remainder of 293.
Write down 8 as next digit of the result. 
Result so far: 18.0
Subtract 2840 from 3133 to get 293.
Take the next digit (5) from the dividend and append it to 293, then repeat: 2935 / 355

Let's proceed to step 5:
The number 355 fits into 2935 8 times, leaving a remainder of 95.
The number 8 becomes the next digit in our result. 
Result so far: 188.0
If we take 2840 away from 2935, we end up with 95.
Grab the next digit (9) from the dividend, add it to 95, then carry on: 959 / 355

Going ahead to step 6:
355 goes into 959 2 times with a remainder of 249.
Use 2 as the next digit of our solution. 
Result so far: 1882.0
If we subtract 710 from 959, we get 249.
Append the next digit (0) from the dividend to 249 and continue with: 2490 / 355

Let's proceed to step 7:
2490 divided by 355 is 7 with a remainder of 5.
The number 7 becomes the next digit in our result. 
Result so far: 18827.0
If we take 2485 away from 2490, we end up with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 355

Step 8:
355 goes into 51 0 times with a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 188270.0
Subtract 0 from 51 to get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Moving on to step 9:
When dividing 510 by 355, we get 1 with a remainder of 155.
The number 1 becomes the next digit in our result. 
Result so far: 188270.1
If we take 355 away from 510, we end up with 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

On to step 10:
The number 355 fits into 1550 4 times, leaving a remainder of 130.
Use 4 as the next digit of our solution. 
Result so far: 188270.14
Subtract 1420 from 1550 to get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

On to step 11:
If we divide 1300 by 355, we get 3 and a remainder of 235.
Put 3 as the next digit of the answer. 
Result so far: 188270.143
The remainder is 235 after subtracting 1065 from 1300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

On to step 12:
If we divide 2350 by 355, we get 6 and a remainder of 220.
Put 6 as the next digit of the answer. 
Result so far: 188270.1436
If we subtract 2130 from 2350, we get 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Step 13:
355 can be fit into 2200 6 times, resulting in a remainder of 70.
Put 6 as the next digit of the answer. 
Result so far: 188270.14366
Deduct 2130 from 2200 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

After the division, we end up with 188270.14366 and a remainder of 7e-05.