We divide 77886121 by 345
The aim is to understand the frequency of 345 in 77886121.

Step 1:
The number 345 fits into 7 0 times, leaving a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (7) from the dividend after 7, then repeat: 77 / 345

Going ahead to step 2:
345 goes into 77 0 times with a remainder of 77.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 77 to get 77.
Bring next digit (8) of the dividend behind the 77 and repeat the process: 778 / 345

Going ahead to step 3:
When dividing 778 by 345, we get 2 with a remainder of 88.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 690 from 778 leaves us with 88.
Take the next digit (8) from the dividend and append it to 88, then repeat: 888 / 345

Step 4:
The number 345 fits into 888 2 times, leaving a remainder of 198.
Put 2 as the next digit of the answer. 
Result so far: 22.0
Deduct 690 from 888 and we're left with 198.
Take the next digit (6) from the dividend and append it to 198, then repeat: 1986 / 345

Let's proceed to step 5:
When dividing 1986 by 345, we get 5 with a remainder of 261.
The number 5 becomes the next digit in our result. 
Result so far: 225.0
If we subtract 1725 from 1986, we get 261.
Grab the next digit (1) from the dividend, add it to 261, then carry on: 2611 / 345

Let's proceed to step 6:
345 goes into 2611 7 times with a remainder of 196.
Record the quotient 7 as the next digit in the result. 
Result so far: 2257.0
If we subtract 2415 from 2611, we get 196.
Grab the next digit (2) from the dividend, add it to 196, then carry on: 1962 / 345

Going ahead to step 7:
When dividing 1962 by 345, we get 5 with a remainder of 237.
Put 5 as the next digit of the answer. 
Result so far: 22575.0
The remainder is 237 after subtracting 1725 from 1962.
Append the next digit (1) from the dividend to 237 and continue with: 2371 / 345

Going ahead to step 8:
2371 divided by 345 is 6 with a remainder of 301.
Put 6 as the next digit of the answer. 
Result so far: 225756.0
Subtracting 2070 from 2371 leaves us with 301.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3010, and continue the process.

Going ahead to step 9:
345 goes into 3010 8 times with a remainder of 250.
Record the quotient 8 as the next digit in the result. 
Result so far: 225756.8
Subtract 2760 from 3010 to get 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

On to step 10:
If we divide 2500 by 345, we get 7 and a remainder of 85.
Record the quotient 7 as the next digit in the result. 
Result so far: 225756.87
Deduct 2415 from 2500 and we're left with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Step 11:
When dividing 850 by 345, we get 2 with a remainder of 160.
Write down 2 as next digit of the result. 
Result so far: 225756.872
The remainder is 160 after subtracting 690 from 850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Going ahead to step 12:
345 goes into 1600 4 times with a remainder of 220.
Record the quotient 4 as the next digit in the result. 
Result so far: 225756.8724
Subtract 1380 from 1600 to 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.

Moving on to step 13:
The number 345 fits into 2200 6 times, leaving a remainder of 130.
The next digit of our result is 6. 
Result so far: 225756.87246
Subtract 2070 from 2200 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.

Going ahead to step 14:
1300 divided by 345 is 3 with a remainder of 265.
Use 3 as the next digit of our solution. 
Result so far: 225756.872463
Subtracting 1035 from 1300 leaves us with 265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

On to step 15:
The number 345 fits into 2650 7 times, leaving a remainder of 235.
Use 7 as the next digit of our solution. 
Result so far: 225756.8724637
If we subtract 2415 from 2650, we get 235.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

Let's proceed to step 16:
The number 345 fits into 2350 6 times, leaving a remainder of 280.
Write down 6 as next digit of the result. 
Result so far: 225756.87246376
If we take 2070 away from 2350, we end up with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

The final outcome is 225756.87246376, with a leftover of 2.8e-07.