We're dividing 10237990 by 154 
The aim is to understand the frequency of 154 in 10237990.

On to step 1:
When dividing 1 by 154, we get 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Grab the next digit (0) from the dividend, add it to 1, then carry on: 10 / 154

Going ahead to step 2:
The number 154 fits into 10 0 times, leaving a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 10, we get 10.
Take the next digit (2) from the dividend and append it to 10, then repeat: 102 / 154

Moving on to step 3:
154 can be fit into 102 0 times, resulting in a remainder of 102.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 102, we end up with 102.
Fetch the next digit (3) from the dividend, attach it to 102 and continue: 1023 / 154

On to step 4:
154 can be fit into 1023 6 times, resulting in a remainder of 99.
Write down 6 as next digit of the result. 
Result so far: 6.0
Deduct 924 from 1023 and we're left with 99.
Bring next digit (7) of the dividend behind the 99 and repeat the process: 997 / 154

Let's proceed to step 5:
If we divide 997 by 154, we get 6 and a remainder of 73.
Put 6 as the next digit of the answer. 
Result so far: 66.0
If we take 924 away from 997, we end up with 73.
Append the next digit (9) from the dividend to 73 and continue with: 739 / 154

Step 6:
When dividing 739 by 154, we get 4 with a remainder of 123.
Use 4 as the next digit of our solution. 
Result so far: 664.0
If we subtract 616 from 739, we get 123.
Append the next digit (9) from the dividend to 123 and continue with: 1239 / 154

Let's proceed to step 7:
The number 154 fits into 1239 8 times, leaving a remainder of 7.
Write down 8 as next digit of the result. 
Result so far: 6648.0
Subtract 1232 from 1239 to get 7.
Grab the next digit (0) from the dividend, add it to 7, then carry on: 70 / 154

Let's proceed to step 8:
70 divided by 154 is 0 with a remainder of 70.
Put 0 as the next digit of the answer. 
Result so far: 66480.0
Deduct 0 from 70 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.

On to step 9:
154 goes into 700 4 times with a remainder of 84.
Record the quotient 4 as the next digit in the result. 
Result so far: 66480.4
Subtracting 616 from 700 leaves us with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Moving on to step 10:
154 goes into 840 5 times with a remainder of 70.
Use 5 as the next digit of our solution. 
Result so far: 66480.45
Subtracting 770 from 840 leaves us 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.

Going ahead to step 11:
700 divided by 154 is 4 with a remainder of 84.
The next digit of our result is 4. 
Result so far: 66480.454
Subtracting 616 from 700 leaves us with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Step 12:
When dividing 840 by 154, we get 5 with a remainder of 70.
The next digit of our result is 5. 
Result so far: 66480.4545
Subtract 770 from 840 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 13:
The number 154 fits into 700 4 times, leaving a remainder of 84.
The number 4 becomes the next digit in our result. 
Result so far: 66480.45454
Deduct 616 from 700 and we're left with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Moving on to step 14:
If we divide 840 by 154, we get 5 and a remainder of 70.
The next digit of our result is 5. 
Result so far: 66480.454545
Subtracting 770 from 840 leaves us 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.

On to step 15:
When dividing 700 by 154, we get 4 with a remainder of 84.
Put 4 as the next digit of the answer. 
Result so far: 66480.4545454
If we take 616 away from 700, we end up with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Let's proceed to step 16:
840 divided by 154 is 5 with a remainder of 70.
Write down 5 as next digit of the result. 
Result so far: 66480.45454545
The remainder is 70 after subtracting 770 from 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The final result is 66480.45454545 with a remainder of 7e-08.