42128257 ÷ 617 
We want to figure out the number of times 42128257 can be divided by 617.

Let's proceed to step 1:
4 divided by 617 is 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 617

Moving on to step 2:
The number 617 fits into 42 0 times, leaving a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Grab the next digit (1) from the dividend, add it to 42, then carry on: 421 / 617

On to step 3:
617 can be fit into 421 0 times, resulting in a remainder of 421.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 421 and we're left with 421.
Grab the next digit (2) from the dividend, add it to 421, then carry on: 4212 / 617

On to step 4:
617 goes into 4212 6 times with a remainder of 510.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
If we take 3702 away from 4212, we end up with 510.
Bring next digit (8) of the dividend behind the 510 and repeat the process: 5108 / 617

Advancing to step 5:
If we divide 5108 by 617, we get 8 and a remainder of 172.
Record the quotient 8 as the next digit in the result. 
Result so far: 68.0
If we take 4936 away from 5108, we end up with 172.
Fetch the next digit (2) from the dividend, attach it to 172 and continue: 1722 / 617

On to step 6:
If we divide 1722 by 617, we get 2 and a remainder of 488.
Use 2 as the next digit of our solution. 
Result so far: 682.0
Subtracting 1234 from 1722 leaves us with 488.
Bring next digit (5) of the dividend behind the 488 and repeat the process: 4885 / 617

Let's proceed to step 7:
When dividing 4885 by 617, we get 7 with a remainder of 566.
Put 7 as the next digit of the answer. 
Result so far: 6827.0
If we subtract 4319 from 4885, we get 566.
Append the next digit (7) from the dividend to 566 and continue with: 5667 / 617

Moving on to step 8:
If we divide 5667 by 617, we get 9 and a remainder of 114.
Use 9 as the next digit of our solution. 
Result so far: 68279.0
If we take 5553 away from 5667, we end up with 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

Moving on to step 9:
The number 617 fits into 1140 1 times, leaving a remainder of 523.
Put 1 as the next digit of the answer. 
Result so far: 68279.1
Subtracting 617 from 1140 leaves us with 523.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5230, and continue the process.

Going ahead to step 10:
617 can be fit into 5230 8 times, resulting in a remainder of 294.
The number 8 becomes the next digit in our result. 
Result so far: 68279.18
The remainder is 294 after subtracting 4936 from 5230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2940, and continue the process.

On to step 11:
617 goes into 2940 4 times with a remainder of 472.
Record the quotient 4 as the next digit in the result. 
Result so far: 68279.184
Subtracting 2468 from 2940 leaves us with 472.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

Let's proceed to step 12:
617 goes into 4720 7 times with a remainder of 401.
Put 7 as the next digit of the answer. 
Result so far: 68279.1847
Deduct 4319 from 4720 and we're left with 401.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4010, and continue the process.

Going ahead to step 13:
617 can be fit into 4010 6 times, resulting in a remainder of 308.
The next digit of our result is 6. 
Result so far: 68279.18476
If we take 3702 away from 4010, we end up with 308.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

Moving on to step 14:
3080 divided by 617 is 4 with a remainder of 612.
Use 4 as the next digit of our solution. 
Result so far: 68279.184764
If we subtract 2468 from 3080, we get 612.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6120, and continue the process.

On to step 15:
The number 617 fits into 6120 9 times, leaving a remainder of 567.
The number 9 becomes the next digit in our result. 
Result so far: 68279.1847649
If we take 5553 away from 6120, we end up with 567.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5670, and continue the process.

Advancing to step 16:
When dividing 5670 by 617, we get 9 with a remainder of 117.
Use 9 as the next digit of our solution. 
Result so far: 68279.18476499
If we take 5553 away from 5670, we end up with 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

The final outcome is 68279.18476499, with a leftover of 1.17e-07.