We look at the division of 6399662 by 138 
We want to figure out the number of times 6399662 can be divided by 138.

Moving on to step 1:
The number 138 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 138

Going ahead to step 2:
When dividing 63 by 138, we get 0 with a remainder of 63.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 63 leaves us with 63.
Fetch the next digit (9) from the dividend, attach it to 63 and continue: 639 / 138

Moving on to step 3:
If we divide 639 by 138, we get 4 and a remainder of 87.
The next digit of our result is 4. 
Result so far: 4.0
If we subtract 552 from 639, we get 87.
Fetch the next digit (9) from the dividend, attach it to 87 and continue: 879 / 138

Going ahead to step 4:
138 goes into 879 6 times with a remainder of 51.
Write down 6 as next digit of the result. 
Result so far: 46.0
The remainder is 51 after subtracting 828 from 879.
Fetch the next digit (6) from the dividend, attach it to 51 and continue: 516 / 138

Step 5:
If we divide 516 by 138, we get 3 and a remainder of 102.
The next digit of our result is 3. 
Result so far: 463.0
If we subtract 414 from 516, we get 102.
Grab the next digit (6) from the dividend, add it to 102, then carry on: 1026 / 138

Step 6:
When dividing 1026 by 138, we get 7 with a remainder of 60.
Use 7 as the next digit of our solution. 
Result so far: 4637.0
The remainder is 60 after subtracting 966 from 1026.
Include the next digit (2) from the dividend after 60, then repeat: 602 / 138

Step 7:
138 goes into 602 4 times with a remainder of 50.
Put 4 as the next digit of the answer. 
Result so far: 46374.0
Subtract 552 from 602 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 8:
The number 138 fits into 500 3 times, leaving a remainder of 86.
Write down 3 as next digit of the result. 
Result so far: 46374.3
Subtracting 414 from 500 leaves us with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Advancing to step 9:
The number 138 fits into 860 6 times, leaving a remainder of 32.
Write down 6 as next digit of the result. 
Result so far: 46374.36
Subtract 828 from 860 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 10:
When dividing 320 by 138, we get 2 with a remainder of 44.
The next digit of our result is 2. 
Result so far: 46374.362
If we take 276 away from 320, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Step 11:
When dividing 440 by 138, we get 3 with a remainder of 26.
The number 3 becomes the next digit in our result. 
Result so far: 46374.3623
Subtract 414 from 440 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 12:
When dividing 260 by 138, we get 1 with a remainder of 122.
The number 1 becomes the next digit in our result. 
Result so far: 46374.36231
Deduct 138 from 260 and we're left with 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

On to step 13:
When dividing 1220 by 138, we get 8 with a remainder of 116.
Write down 8 as next digit of the result. 
Result so far: 46374.362318
If we subtract 1104 from 1220, we get 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

On to step 14:
138 can be fit into 1160 8 times, resulting in a remainder of 56.
Put 8 as the next digit of the answer. 
Result so far: 46374.3623188
The remainder is 56 after subtracting 1104 from 1160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

In conclusion, the division gives 46374.3623188 with a balance of 5.6e-07.