81961406 divided by 602 
The aim is to understand the frequency of 602 in 81961406.

Let's proceed to step 1:
8 divided by 602 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 602

On to step 2:
81 divided by 602 is 0 with a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Fetch the next digit (9) from the dividend, attach it to 81 and continue: 819 / 602

Going ahead to step 3:
If we divide 819 by 602, we get 1 and a remainder of 217.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 602 from 819, we get 217.
Grab the next digit (6) from the dividend, add it to 217, then carry on: 2176 / 602

Going ahead to step 4:
The number 602 fits into 2176 3 times, leaving a remainder of 370.
Put 3 as the next digit of the answer. 
Result so far: 13.0
Subtracting 1806 from 2176 leaves us with 370.
Append the next digit (1) from the dividend to 370 and continue with: 3701 / 602

Step 5:
602 goes into 3701 6 times with a remainder of 89.
Use 6 as the next digit of our solution. 
Result so far: 136.0
If we subtract 3612 from 3701, we get 89.
Append the next digit (4) from the dividend to 89 and continue with: 894 / 602

Advancing to step 6:
The number 602 fits into 894 1 times, leaving a remainder of 292.
Use 1 as the next digit of our solution. 
Result so far: 1361.0
Deduct 602 from 894 and we're left with 292.
Append the next digit (0) from the dividend to 292 and continue with: 2920 / 602

Advancing to step 7:
602 goes into 2920 4 times with a remainder of 512.
Write down 4 as next digit of the result. 
Result so far: 13614.0
If we take 2408 away from 2920, we end up with 512.
Append the next digit (6) from the dividend to 512 and continue with: 5126 / 602

Going ahead to step 8:
If we divide 5126 by 602, we get 8 and a remainder of 310.
Record the quotient 8 as the next digit in the result. 
Result so far: 136148.0
The remainder is 310 after subtracting 4816 from 5126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Step 9:
602 goes into 3100 5 times with a remainder of 90.
Put 5 as the next digit of the answer. 
Result so far: 136148.5
If we take 3010 away from 3100, we end up with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

On to step 10:
The number 602 fits into 900 1 times, leaving a remainder of 298.
Put 1 as the next digit of the answer. 
Result so far: 136148.51
The remainder is 298 after subtracting 602 from 900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

Step 11:
602 goes into 2980 4 times with a remainder of 572.
Record the quotient 4 as the next digit in the result. 
Result so far: 136148.514
If we take 2408 away from 2980, we end up with 572.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5720, and continue the process.

Advancing to step 12:
602 goes into 5720 9 times with a remainder of 302.
The next digit of our result is 9. 
Result so far: 136148.5149
If we take 5418 away from 5720, we end up with 302.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3020, and continue the process.

Step 13:
The number 602 fits into 3020 5 times, leaving a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 136148.51495
If we subtract 3010 from 3020, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 14:
602 can be fit into 100 0 times, resulting in a remainder of 100.
Put 0 as the next digit of the answer. 
Result so far: 136148.51495
Deduct 0 from 100 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Going ahead to step 15:
The number 602 fits into 1000 1 times, leaving a remainder of 398.
The next digit of our result is 1. 
Result so far: 136148.5149501
Subtract 602 from 1000 to get 398.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

Step 16:
If we divide 3980 by 602, we get 6 and a remainder of 368.
Write down 6 as next digit of the result. 
Result so far: 136148.51495016
Subtracting 3612 from 3980 leaves us with 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

The final outcome is 136148.51495016, with a leftover of 3.68e-07.