915986 ÷ 42 
We want to figure out the number of times 915986 can be divided by 42.

On to step 1:
42 can be fit into 9 0 times, resulting in a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Include the next digit (1) from the dividend after 9, then repeat: 91 / 42

Moving on to step 2:
42 can be fit into 91 2 times, resulting in a remainder of 7.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 84 from 91, we get 7.
Fetch the next digit (5) from the dividend, attach it to 7 and continue: 75 / 42

Moving on to step 3:
If we divide 75 by 42, we get 1 and a remainder of 33.
The next digit of our result is 1. 
Result so far: 21.0
The remainder is 33 after subtracting 42 from 75.
Fetch the next digit (9) from the dividend, attach it to 33 and continue: 339 / 42

Advancing to step 4:
When dividing 339 by 42, we get 8 with a remainder of 3.
The number 8 becomes the next digit in our result. 
Result so far: 218.0
Deduct 336 from 339 and we're left with 3.
Fetch the next digit (8) from the dividend, attach it to 3 and continue: 38 / 42

Going ahead to step 5:
42 goes into 38 0 times with a remainder of 38.
Write down 0 as next digit of the result. 
Result so far: 2180.0
If we take 0 away from 38, we end up with 38.
Append the next digit (6) from the dividend to 38 and continue with: 386 / 42

Moving on to step 6:
The number 42 fits into 386 9 times, leaving a remainder of 8.
The next digit of our result is 9. 
Result so far: 21809.0
Deduct 378 from 386 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 7:
42 goes into 80 1 times with a remainder of 38.
The next digit of our result is 1. 
Result so far: 21809.1
Subtract 42 from 80 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 8:
42 can be fit into 380 9 times, resulting in a remainder of 2.
The number 9 becomes the next digit in our result. 
Result so far: 21809.19
Subtracting 378 from 380 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 9:
20 divided by 42 is 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 21809.19
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 10:
42 can be fit into 200 4 times, resulting in a remainder of 32.
Use 4 as the next digit of our solution. 
Result so far: 21809.1904
If we take 168 away from 200, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 11:
42 can be fit into 320 7 times, resulting in a remainder of 26.
Put 7 as the next digit of the answer. 
Result so far: 21809.19047
If we take 294 away from 320, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 12:
42 goes into 260 6 times with a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 21809.190476
Subtract 252 from 260 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 13:
The number 42 fits into 80 1 times, leaving a remainder of 38.
Use 1 as the next digit of our solution. 
Result so far: 21809.1904761
If we take 42 away from 80, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 14:
If we divide 380 by 42, we get 9 and a remainder of 2.
The number 9 becomes the next digit in our result. 
Result so far: 21809.19047619
The remainder is 2 after subtracting 378 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The quotient of the division is 21809.19047619, and the remainder is 2e-09.