We're dividing 66544390 by 642 
We want to divide 66544390 by 642.

On to step 1:
When dividing 6 by 642, we get 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 642

Step 2:
The number 642 fits into 66 0 times, leaving a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Fetch the next digit (5) from the dividend, attach it to 66 and continue: 665 / 642

Advancing to step 3:
642 can be fit into 665 1 times, resulting in a remainder of 23.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 23 after subtracting 642 from 665.
Append the next digit (4) from the dividend to 23 and continue with: 234 / 642

Advancing to step 4:
234 divided by 642 is 0 with a remainder of 234.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Deduct 0 from 234 and we're left with 234.
Fetch the next digit (4) from the dividend, attach it to 234 and continue: 2344 / 642

Advancing to step 5:
When dividing 2344 by 642, we get 3 with a remainder of 418.
Record the quotient 3 as the next digit in the result. 
Result so far: 103.0
Subtract 1926 from 2344 to get 418.
Fetch the next digit (3) from the dividend, attach it to 418 and continue: 4183 / 642

Going ahead to step 6:
If we divide 4183 by 642, we get 6 and a remainder of 331.
Write down 6 as next digit of the result. 
Result so far: 1036.0
Subtracting 3852 from 4183 leaves us with 331.
Include the next digit (9) from the dividend after 331, then repeat: 3319 / 642

Advancing to step 7:
When dividing 3319 by 642, we get 5 with a remainder of 109.
Record the quotient 5 as the next digit in the result. 
Result so far: 10365.0
If we take 3210 away from 3319, we end up with 109.
Include the next digit (0) from the dividend after 109, then repeat: 1090 / 642

Advancing to step 8:
The number 642 fits into 1090 1 times, leaving a remainder of 448.
Record the quotient 1 as the next digit in the result. 
Result so far: 103651.0
If we take 642 away from 1090, we end up with 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

Moving on to step 9:
The number 642 fits into 4480 6 times, leaving a remainder of 628.
Write down 6 as next digit of the result. 
Result so far: 103651.6
Subtract 3852 from 4480 to get 628.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6280, and continue the process.

Advancing to step 10:
642 goes into 6280 9 times with a remainder of 502.
The next digit of our result is 9. 
Result so far: 103651.69
If we take 5778 away from 6280, we end up with 502.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5020, and continue the process.

On to step 11:
When dividing 5020 by 642, we get 7 with a remainder of 526.
The next digit of our result is 7. 
Result so far: 103651.697
Deduct 4494 from 5020 and we're left with 526.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5260, and continue the process.

On to step 12:
642 goes into 5260 8 times with a remainder of 124.
The next digit of our result is 8. 
Result so far: 103651.6978
If we take 5136 away from 5260, we end up with 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Step 13:
642 goes into 1240 1 times with a remainder of 598.
Record the quotient 1 as the next digit in the result. 
Result so far: 103651.69781
The remainder is 598 after subtracting 642 from 1240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5980, and continue the process.

Let's proceed to step 14:
5980 divided by 642 is 9 with a remainder of 202.
The next digit of our result is 9. 
Result so far: 103651.697819
Subtract 5778 from 5980 to get 202.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

On to step 15:
When dividing 2020 by 642, we get 3 with a remainder of 94.
The number 3 becomes the next digit in our result. 
Result so far: 103651.6978193
If we take 1926 away from 2020, we end up with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Advancing to step 16:
642 goes into 940 1 times with a remainder of 298.
Put 1 as the next digit of the answer. 
Result so far: 103651.69781931
If we subtract 642 from 940, we get 298.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

In conclusion, the division gives 103651.69781931 with a balance of 2.98e-07.