51309989 ÷ 487 
The aim is to understand the frequency of 487 in 51309989.

Going ahead to step 1:
5 divided by 487 is 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 487

Going ahead to step 2:
The number 487 fits into 51 0 times, leaving a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 51, we end up with 51.
Include the next digit (3) from the dividend after 51, then repeat: 513 / 487

Let's proceed to step 3:
487 can be fit into 513 1 times, resulting in a remainder of 26.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 26 after subtracting 487 from 513.
Bring next digit (0) of the dividend behind the 26 and repeat the process: 260 / 487

Advancing to step 4:
The number 487 fits into 260 0 times, leaving a remainder of 260.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Subtracting 0 from 260 leaves us with 260.
Fetch the next digit (9) from the dividend, attach it to 260 and continue: 2609 / 487

Step 5:
When dividing 2609 by 487, we get 5 with a remainder of 174.
Put 5 as the next digit of the answer. 
Result so far: 105.0
Subtract 2435 from 2609 to get 174.
Fetch the next digit (9) from the dividend, attach it to 174 and continue: 1749 / 487

Moving on to step 6:
If we divide 1749 by 487, we get 3 and a remainder of 288.
Record the quotient 3 as the next digit in the result. 
Result so far: 1053.0
Deduct 1461 from 1749 and we're left with 288.
Append the next digit (8) from the dividend to 288 and continue with: 2888 / 487

Going ahead to step 7:
487 goes into 2888 5 times with a remainder of 453.
The next digit of our result is 5. 
Result so far: 10535.0
If we take 2435 away from 2888, we end up with 453.
Grab the next digit (9) from the dividend, add it to 453, then carry on: 4539 / 487

Advancing to step 8:
487 goes into 4539 9 times with a remainder of 156.
Write down 9 as next digit of the result. 
Result so far: 105359.0
Subtracting 4383 from 4539 leaves us with 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Let's proceed to step 9:
The number 487 fits into 1560 3 times, leaving a remainder of 99.
Put 3 as the next digit of the answer. 
Result so far: 105359.3
Subtract 1461 from 1560 to 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.

On to step 10:
990 divided by 487 is 2 with a remainder of 16.
Record the quotient 2 as the next digit in the result. 
Result so far: 105359.32
If we take 974 away from 990, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 11:
When dividing 160 by 487, we get 0 with a remainder of 160.
The number 0 becomes the next digit in our result. 
Result so far: 105359.32
Subtracting 0 from 160 leaves us with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 12:
487 goes into 1600 3 times with a remainder of 139.
Record the quotient 3 as the next digit in the result. 
Result so far: 105359.3203
Deduct 1461 from 1600 and we're left with 139.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1390, and continue the process.

Advancing to step 13:
487 goes into 1390 2 times with a remainder of 416.
Use 2 as the next digit of our solution. 
Result so far: 105359.32032
If we subtract 974 from 1390, we get 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Advancing to step 14:
When dividing 4160 by 487, we get 8 with a remainder of 264.
Use 8 as the next digit of our solution. 
Result so far: 105359.320328
Subtract 3896 from 4160 to get 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Advancing to step 15:
If we divide 2640 by 487, we get 5 and a remainder of 205.
Record the quotient 5 as the next digit in the result. 
Result so far: 105359.3203285
Deduct 2435 from 2640 and we're left with 205.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

Advancing to step 16:
2050 divided by 487 is 4 with a remainder of 102.
The number 4 becomes the next digit in our result. 
Result so far: 105359.32032854
Deduct 1948 from 2050 and we're left with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

After the division, we end up with 105359.32032854 and a remainder of 1.02e-07.