We look at the division of 42102454 by 655 
We want to figure out the number of times 42102454 can be divided by 655.

On to step 1:
4 divided by 655 is 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 655

Step 2:
42 divided by 655 is 0 with a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Include the next digit (1) from the dividend after 42, then repeat: 421 / 655

Moving on to step 3:
When dividing 421 by 655, we get 0 with a remainder of 421.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 421 and we're left with 421.
Bring next digit (0) of the dividend behind the 421 and repeat the process: 4210 / 655

On to step 4:
When dividing 4210 by 655, we get 6 with a remainder of 280.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
If we take 3930 away from 4210, we end up with 280.
Take the next digit (2) from the dividend and append it to 280, then repeat: 2802 / 655

Going ahead to step 5:
655 can be fit into 2802 4 times, resulting in a remainder of 182.
Use 4 as the next digit of our solution. 
Result so far: 64.0
Deduct 2620 from 2802 and we're left with 182.
Fetch the next digit (4) from the dividend, attach it to 182 and continue: 1824 / 655

Moving on to step 6:
When dividing 1824 by 655, we get 2 with a remainder of 514.
Put 2 as the next digit of the answer. 
Result so far: 642.0
If we take 1310 away from 1824, we end up with 514.
Fetch the next digit (5) from the dividend, attach it to 514 and continue: 5145 / 655

On to step 7:
If we divide 5145 by 655, we get 7 and a remainder of 560.
Use 7 as the next digit of our solution. 
Result so far: 6427.0
The remainder is 560 after subtracting 4585 from 5145.
Append the next digit (4) from the dividend to 560 and continue with: 5604 / 655

Going ahead to step 8:
The number 655 fits into 5604 8 times, leaving a remainder of 364.
Write down 8 as next digit of the result. 
Result so far: 64278.0
The remainder is 364 after subtracting 5240 from 5604.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

Going ahead to step 9:
655 can be fit into 3640 5 times, resulting in a remainder of 365.
Use 5 as the next digit of our solution. 
Result so far: 64278.5
If we take 3275 away from 3640, we end up with 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Step 10:
If we divide 3650 by 655, we get 5 and a remainder of 375.
The next digit of our result is 5. 
Result so far: 64278.55
If we take 3275 away from 3650, we end up with 375.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3750, and continue the process.

The quotient of the division is 64278.55, and the remainder is 0.375.