42981275 ÷ 642 
Let's see how many times 642 fits into 42981275.

Moving on to step 1:
When dividing 4 by 642, we get 0 with a remainder of 4.
The number 0 becomes the next digit in our 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 / 642

Step 2:
The number 642 fits into 42 0 times, leaving a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Append the next digit (9) from the dividend to 42 and continue with: 429 / 642

Step 3:
When dividing 429 by 642, we get 0 with a remainder of 429.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 429, we end up with 429.
Bring next digit (8) of the dividend behind the 429 and repeat the process: 4298 / 642

Moving on to step 4:
4298 divided by 642 is 6 with a remainder of 446.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
If we subtract 3852 from 4298, we get 446.
Include the next digit (1) from the dividend after 446, then repeat: 4461 / 642

Going ahead to step 5:
642 can be fit into 4461 6 times, resulting in a remainder of 609.
The number 6 becomes the next digit in our result. 
Result so far: 66.0
Deduct 3852 from 4461 and we're left with 609.
Bring next digit (2) of the dividend behind the 609 and repeat the process: 6092 / 642

Moving on to step 6:
6092 divided by 642 is 9 with a remainder of 314.
The number 9 becomes the next digit in our result. 
Result so far: 669.0
If we take 5778 away from 6092, we end up with 314.
Include the next digit (7) from the dividend after 314, then repeat: 3147 / 642

Step 7:
When dividing 3147 by 642, we get 4 with a remainder of 579.
Use 4 as the next digit of our solution. 
Result so far: 6694.0
If we take 2568 away from 3147, we end up with 579.
Append the next digit (5) from the dividend to 579 and continue with: 5795 / 642

On to step 8:
When dividing 5795 by 642, we get 9 with a remainder of 17.
Put 9 as the next digit of the answer. 
Result so far: 66949.0
Subtract 5778 from 5795 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 9:
642 can be fit into 170 0 times, resulting in a remainder of 170.
Put 0 as the next digit of the answer. 
Result so far: 66949.0
The remainder is 170 after subtracting 0 from 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Advancing to step 10:
1700 divided by 642 is 2 with a remainder of 416.
Put 2 as the next digit of the answer. 
Result so far: 66949.02
Subtracting 1284 from 1700 leaves us with 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Advancing to step 11:
If we divide 4160 by 642, we get 6 and a remainder of 308.
Write down 6 as next digit of the result. 
Result so far: 66949.026
Subtract 3852 from 4160 to get 308.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

Going ahead to step 12:
When dividing 3080 by 642, we get 4 with a remainder of 512.
The next digit of our result is 4. 
Result so far: 66949.0264
If we subtract 2568 from 3080, we get 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

Moving on to step 13:
When dividing 5120 by 642, we get 7 with a remainder of 626.
Write down 7 as next digit of the result. 
Result so far: 66949.02647
Subtract 4494 from 5120 to get 626.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6260, and continue the process.

Going ahead to step 14:
6260 divided by 642 is 9 with a remainder of 482.
Use 9 as the next digit of our solution. 
Result so far: 66949.026479
Deduct 5778 from 6260 and we're left with 482.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4820, and continue the process.

Let's proceed to step 15:
642 can be fit into 4820 7 times, resulting in a remainder of 326.
Write down 7 as next digit of the result. 
Result so far: 66949.0264797
Deduct 4494 from 4820 and we're left with 326.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3260, and continue the process.

Going ahead to step 16:
If we divide 3260 by 642, we get 5 and a remainder of 50.
The next digit of our result is 5. 
Result so far: 66949.02647975
Deduct 3210 from 3260 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The final outcome is 66949.02647975, with a leftover of 5e-08.