42188420 ÷ 649 
We want to divide 42188420 by 649.

On to step 1:
The number 649 fits into 4 0 times, leaving a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 649

On to step 2:
649 goes into 42 0 times with a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Include the next digit (1) from the dividend after 42, then repeat: 421 / 649

Let's proceed to step 3:
If we divide 421 by 649, we get 0 and a remainder of 421.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 421 leaves us with 421.
Grab the next digit (8) from the dividend, add it to 421, then carry on: 4218 / 649

Moving on to step 4:
The number 649 fits into 4218 6 times, leaving a remainder of 324.
Use 6 as the next digit of our solution. 
Result so far: 6.0
If we take 3894 away from 4218, we end up with 324.
Fetch the next digit (8) from the dividend, attach it to 324 and continue: 3248 / 649

Step 5:
649 goes into 3248 5 times with a remainder of 3.
Use 5 as the next digit of our solution. 
Result so far: 65.0
Deduct 3245 from 3248 and we're left with 3.
Fetch the next digit (4) from the dividend, attach it to 3 and continue: 34 / 649

On to step 6:
If we divide 34 by 649, we get 0 and a remainder of 34.
Write down 0 as next digit of the result. 
Result so far: 650.0
Deduct 0 from 34 and we're left with 34.
Include the next digit (2) from the dividend after 34, then repeat: 342 / 649

Moving on to step 7:
649 can be fit into 342 0 times, resulting in a remainder of 342.
Record the quotient 0 as the next digit in the result. 
Result so far: 6500.0
The remainder is 342 after subtracting 0 from 342.
Grab the next digit (0) from the dividend, add it to 342, then carry on: 3420 / 649

Let's proceed to step 8:
The number 649 fits into 3420 5 times, leaving a remainder of 175.
The next digit of our result is 5. 
Result so far: 65005.0
The remainder is 175 after subtracting 3245 from 3420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

Going ahead to step 9:
The number 649 fits into 1750 2 times, leaving a remainder of 452.
The next digit of our result is 2. 
Result so far: 65005.2
Subtracting 1298 from 1750 leaves us with 452.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4520, and continue the process.

Step 10:
649 can be fit into 4520 6 times, resulting in a remainder of 626.
Put 6 as the next digit of the answer. 
Result so far: 65005.26
If we take 3894 away from 4520, we end up with 626.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6260, and continue the process.

Moving on to step 11:
649 goes into 6260 9 times with a remainder of 419.
The number 9 becomes the next digit in our result. 
Result so far: 65005.269
If we take 5841 away from 6260, we end up with 419.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4190, and continue the process.

Moving on to step 12:
649 goes into 4190 6 times with a remainder of 296.
Record the quotient 6 as the next digit in the result. 
Result so far: 65005.2696
Subtract 3894 from 4190 to get 296.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

Let's proceed to step 13:
If we divide 2960 by 649, we get 4 and a remainder of 364.
The next digit of our result is 4. 
Result so far: 65005.26964
Deduct 2596 from 2960 and we're left with 364.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

Step 14:
3640 divided by 649 is 5 with a remainder of 395.
The number 5 becomes the next digit in our result. 
Result so far: 65005.269645
The remainder is 395 after subtracting 3245 from 3640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

Advancing to step 15:
If we divide 3950 by 649, we get 6 and a remainder of 56.
The next digit of our result is 6. 
Result so far: 65005.2696456
Subtracting 3894 from 3950 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 16:
649 can be fit into 560 0 times, resulting in a remainder of 560.
Put 0 as the next digit of the answer. 
Result so far: 65005.2696456
If we subtract 0 from 560, we get 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

The final outcome is 65005.2696456, with a leftover of 5.6e-07.