We look at the division of 42475717 by 642 
We're looking to find how many times 642 goes into 42475717.

Moving on to step 1:
If we divide 4 by 642, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 642

Going ahead to step 2:
642 goes into 42 0 times with a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Take the next digit (4) from the dividend and append it to 42, then repeat: 424 / 642

Going ahead to step 3:
424 divided by 642 is 0 with a remainder of 424.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 424, we get 424.
Bring next digit (7) of the dividend behind the 424 and repeat the process: 4247 / 642

Let's proceed to step 4:
When dividing 4247 by 642, we get 6 with a remainder of 395.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
If we subtract 3852 from 4247, we get 395.
Bring next digit (5) of the dividend behind the 395 and repeat the process: 3955 / 642

Going ahead to step 5:
The number 642 fits into 3955 6 times, leaving a remainder of 103.
Write down 6 as next digit of the result. 
Result so far: 66.0
Deduct 3852 from 3955 and we're left with 103.
Grab the next digit (7) from the dividend, add it to 103, then carry on: 1037 / 642

Let's proceed to step 6:
The number 642 fits into 1037 1 times, leaving a remainder of 395.
Record the quotient 1 as the next digit in the result. 
Result so far: 661.0
If we take 642 away from 1037, we end up with 395.
Include the next digit (1) from the dividend after 395, then repeat: 3951 / 642

Let's proceed to step 7:
The number 642 fits into 3951 6 times, leaving a remainder of 99.
The next digit of our result is 6. 
Result so far: 6616.0
The remainder is 99 after subtracting 3852 from 3951.
Take the next digit (7) from the dividend and append it to 99, then repeat: 997 / 642

Step 8:
The number 642 fits into 997 1 times, leaving a remainder of 355.
Write down 1 as next digit of the result. 
Result so far: 66161.0
Subtracting 642 from 997 leaves us with 355.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3550, and continue the process.

Advancing to step 9:
642 can be fit into 3550 5 times, resulting in a remainder of 340.
Write down 5 as next digit of the result. 
Result so far: 66161.5
Subtract 3210 from 3550 to get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Moving on to step 10:
642 can be fit into 3400 5 times, resulting in a remainder of 190.
The next digit of our result is 5. 
Result so far: 66161.55
If we take 3210 away from 3400, we end up with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

After the division, we end up with 66161.55 and a remainder of 0.19.