51721419 ÷ 359 
The aim is to understand the frequency of 359 in 51721419.

Going ahead to step 1:
When dividing 5 by 359, we get 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 359

Moving on to step 2:
The number 359 fits into 51 0 times, leaving a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 51 and we're left with 51.
Take the next digit (7) from the dividend and append it to 51, then repeat: 517 / 359

On to step 3:
If we divide 517 by 359, we get 1 and a remainder of 158.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 359 from 517 to get 158.
Include the next digit (2) from the dividend after 158, then repeat: 1582 / 359

Advancing to step 4:
359 goes into 1582 4 times with a remainder of 146.
Use 4 as the next digit of our solution. 
Result so far: 14.0
The remainder is 146 after subtracting 1436 from 1582.
Take the next digit (1) from the dividend and append it to 146, then repeat: 1461 / 359

On to step 5:
359 goes into 1461 4 times with a remainder of 25.
Use 4 as the next digit of our solution. 
Result so far: 144.0
Deduct 1436 from 1461 and we're left with 25.
Grab the next digit (4) from the dividend, add it to 25, then carry on: 254 / 359

Going ahead to step 6:
If we divide 254 by 359, we get 0 and a remainder of 254.
Record the quotient 0 as the next digit in the result. 
Result so far: 1440.0
Subtracting 0 from 254 leaves us with 254.
Grab the next digit (1) from the dividend, add it to 254, then carry on: 2541 / 359

Step 7:
When dividing 2541 by 359, we get 7 with a remainder of 28.
Put 7 as the next digit of the answer. 
Result so far: 14407.0
The remainder is 28 after subtracting 2513 from 2541.
Take the next digit (9) from the dividend and append it to 28, then repeat: 289 / 359

On to step 8:
If we divide 289 by 359, we get 0 and a remainder of 289.
The next digit of our result is 0. 
Result so far: 144070.0
Deduct 0 from 289 and we're left with 289.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2890, and continue the process.

Let's proceed to step 9:
359 goes into 2890 8 times with a remainder of 18.
Put 8 as the next digit of the answer. 
Result so far: 144070.8
The remainder is 18 after subtracting 2872 from 2890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 10:
If we divide 180 by 359, we get 0 and a remainder of 180.
The number 0 becomes the next digit in our result. 
Result so far: 144070.8
Deduct 0 from 180 and we're left with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Let's proceed to step 11:
The number 359 fits into 1800 5 times, leaving a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 144070.805
Subtracting 1795 from 1800 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 12:
359 can be fit into 50 0 times, resulting in a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 144070.805
If we take 0 away from 50, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 13:
500 divided by 359 is 1 with a remainder of 141.
Use 1 as the next digit of our solution. 
Result so far: 144070.80501
If we take 359 away from 500, we end up with 141.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1410, and continue the process.

Let's proceed to step 14:
When dividing 1410 by 359, we get 3 with a remainder of 333.
Use 3 as the next digit of our solution. 
Result so far: 144070.805013
The remainder is 333 after subtracting 1077 from 1410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3330, and continue the process.

Step 15:
359 goes into 3330 9 times with a remainder of 99.
The number 9 becomes the next digit in our result. 
Result so far: 144070.8050139
If we subtract 3231 from 3330, we get 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Moving on to step 16:
The number 359 fits into 990 2 times, leaving a remainder of 272.
Write down 2 as next digit of the result. 
Result so far: 144070.80501392
Deduct 718 from 990 and we're left with 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

The final result is 144070.80501392 with a remainder of 2.72e-07.