We're dividing 937991 by 3 
We want to figure out the number of times 937991 can be divided by 3.

Going ahead to step 1:
If we divide 9 by 3, we get 3 and a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtracting 9 from 9 leaves us with 0.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 3

Going ahead to step 2:
3 goes into 3 1 times with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 31.0
Subtracting 3 from 3 leaves us with 0.
Include the next digit (7) from the dividend after 0, then repeat: 7 / 3

Moving on to step 3:
When dividing 7 by 3, we get 2 with a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 312.0
Deduct 6 from 7 and we're left with 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 3

Advancing to step 4:
If we divide 19 by 3, we get 6 and a remainder of 1.
Write down 6 as next digit of the result. 
Result so far: 3126.0
Subtracting 18 from 19 leaves us with 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 3

Advancing to step 5:
If we divide 19 by 3, we get 6 and a remainder of 1.
Record the quotient 6 as the next digit in the result. 
Result so far: 31266.0
The remainder is 1 after subtracting 18 from 19.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 3

Step 6:
The number 3 fits into 11 3 times, leaving a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 312663.0
Subtract 9 from 11 to get 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 7:
When dividing 20 by 3, we get 6 with a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 312663.6
The remainder is 2 after subtracting 18 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 8:
3 goes into 20 6 times with a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 312663.66
Subtract 18 from 20 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

After the division, we end up with 312663.66 and a remainder of 0.002.