42891986 divided by 122 
We want to figure out the number of times 42891986 can be divided by 122.

Moving on to step 1:
The number 122 fits into 4 0 times, leaving a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 122

On to step 2:
When dividing 42 by 122, we get 0 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.
Grab the next digit (8) from the dividend, add it to 42, then carry on: 428 / 122

On to step 3:
The number 122 fits into 428 3 times, leaving a remainder of 62.
Write down 3 as next digit of the result. 
Result so far: 3.0
Deduct 366 from 428 and we're left with 62.
Include the next digit (9) from the dividend after 62, then repeat: 629 / 122

Moving on to step 4:
When dividing 629 by 122, we get 5 with a remainder of 19.
Write down 5 as next digit of the result. 
Result so far: 35.0
The remainder is 19 after subtracting 610 from 629.
Append the next digit (1) from the dividend to 19 and continue with: 191 / 122

Step 5:
191 divided by 122 is 1 with a remainder of 69.
Use 1 as the next digit of our solution. 
Result so far: 351.0
If we take 122 away from 191, we end up with 69.
Include the next digit (9) from the dividend after 69, then repeat: 699 / 122

Advancing to step 6:
699 divided by 122 is 5 with a remainder of 89.
Use 5 as the next digit of our solution. 
Result so far: 3515.0
The remainder is 89 after subtracting 610 from 699.
Grab the next digit (8) from the dividend, add it to 89, then carry on: 898 / 122

Moving on to step 7:
If we divide 898 by 122, we get 7 and a remainder of 44.
The next digit of our result is 7. 
Result so far: 35157.0
Subtracting 854 from 898 leaves us with 44.
Bring next digit (6) of the dividend behind the 44 and repeat the process: 446 / 122

On to step 8:
446 divided by 122 is 3 with a remainder of 80.
The next digit of our result is 3. 
Result so far: 351573.0
Subtract 366 from 446 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 9:
When dividing 800 by 122, we get 6 with a remainder of 68.
The next digit of our result is 6. 
Result so far: 351573.6
The remainder is 68 after subtracting 732 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Step 10:
When dividing 680 by 122, we get 5 with a remainder of 70.
Record the quotient 5 as the next digit in the result. 
Result so far: 351573.65
Deduct 610 from 680 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 11:
When dividing 700 by 122, we get 5 with a remainder of 90.
The next digit of our result is 5. 
Result so far: 351573.655
Subtracting 610 from 700 leaves us with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Our division results in 351573.655 with a remaining 0.009.