We divide 50137818 by 646
The aim is to understand the frequency of 646 in 50137818.

On to step 1:
When dividing 5 by 646, we get 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Append the next digit (0) from the dividend to 5 and continue with: 50 / 646

On to step 2:
When dividing 50 by 646, we get 0 with a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 50 leaves us with 50.
Append the next digit (1) from the dividend to 50 and continue with: 501 / 646

Let's proceed to step 3:
646 goes into 501 0 times with a remainder of 501.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 501, we end up with 501.
Take the next digit (3) from the dividend and append it to 501, then repeat: 5013 / 646

Let's proceed to step 4:
5013 divided by 646 is 7 with a remainder of 491.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtract 4522 from 5013 to get 491.
Include the next digit (7) from the dividend after 491, then repeat: 4917 / 646

Step 5:
646 goes into 4917 7 times with a remainder of 395.
Use 7 as the next digit of our solution. 
Result so far: 77.0
Deduct 4522 from 4917 and we're left with 395.
Fetch the next digit (8) from the dividend, attach it to 395 and continue: 3958 / 646

On to step 6:
646 goes into 3958 6 times with a remainder of 82.
Record the quotient 6 as the next digit in the result. 
Result so far: 776.0
Subtract 3876 from 3958 to get 82.
Grab the next digit (1) from the dividend, add it to 82, then carry on: 821 / 646

Moving on to step 7:
The number 646 fits into 821 1 times, leaving a remainder of 175.
Record the quotient 1 as the next digit in the result. 
Result so far: 7761.0
If we subtract 646 from 821, we get 175.
Bring next digit (8) of the dividend behind the 175 and repeat the process: 1758 / 646

Going ahead to step 8:
When dividing 1758 by 646, we get 2 with a remainder of 466.
Put 2 as the next digit of the answer. 
Result so far: 77612.0
If we take 1292 away from 1758, we end up with 466.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4660, and continue the process.

Step 9:
646 goes into 4660 7 times with a remainder of 138.
Put 7 as the next digit of the answer. 
Result so far: 77612.7
Deduct 4522 from 4660 and we're left with 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

Let's proceed to step 10:
The number 646 fits into 1380 2 times, leaving a remainder of 88.
The number 2 becomes the next digit in our result. 
Result so far: 77612.72
If we take 1292 away from 1380, we end up with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Step 11:
646 goes into 880 1 times with a remainder of 234.
The next digit of our result is 1. 
Result so far: 77612.721
The remainder is 234 after subtracting 646 from 880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

Let's proceed to step 12:
If we divide 2340 by 646, we get 3 and a remainder of 402.
The number 3 becomes the next digit in our result. 
Result so far: 77612.7213
Deduct 1938 from 2340 and we're left with 402.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

On to step 13:
The number 646 fits into 4020 6 times, leaving a remainder of 144.
Record the quotient 6 as the next digit in the result. 
Result so far: 77612.72136
The remainder is 144 after subtracting 3876 from 4020.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Advancing to step 14:
If we divide 1440 by 646, we get 2 and a remainder of 148.
Use 2 as the next digit of our solution. 
Result so far: 77612.721362
Subtract 1292 from 1440 to get 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Let's proceed to step 15:
When dividing 1480 by 646, we get 2 with a remainder of 188.
Put 2 as the next digit of the answer. 
Result so far: 77612.7213622
If we subtract 1292 from 1480, we get 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

The final outcome is 77612.7213622, with a leftover of 1.88e-06.