16404987 divided by 7 
We want to divide 16404987 by 7.

On to step 1:
7 goes into 1 0 times with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 7

On to step 2:
16 divided by 7 is 2 with a remainder of 2.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 14 from 16 to get 2.
Append the next digit (4) from the dividend to 2 and continue with: 24 / 7

Moving on to step 3:
If we divide 24 by 7, we get 3 and a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
If we subtract 21 from 24, we get 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 7

Moving on to step 4:
7 can be fit into 30 4 times, resulting in a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 234.0
If we take 28 away from 30, we end up with 2.
Take the next digit (4) from the dividend and append it to 2, then repeat: 24 / 7

Let's proceed to step 5:
The number 7 fits into 24 3 times, leaving a remainder of 3.
Write down 3 as next digit of the result. 
Result so far: 2343.0
If we subtract 21 from 24, we get 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 7

Advancing to step 6:
When dividing 39 by 7, we get 5 with a remainder of 4.
The number 5 becomes the next digit in our result. 
Result so far: 23435.0
If we take 35 away from 39, we end up with 4.
Bring next digit (8) of the dividend behind the 4 and repeat the process: 48 / 7

Moving on to step 7:
7 goes into 48 6 times with a remainder of 6.
Put 6 as the next digit of the answer. 
Result so far: 234356.0
If we subtract 42 from 48, we get 6.
Take the next digit (7) from the dividend and append it to 6, then repeat: 67 / 7

Advancing to step 8:
When dividing 67 by 7, we get 9 with a remainder of 4.
The number 9 becomes the next digit in our result. 
Result so far: 2343569.0
Deduct 63 from 67 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 9:
7 goes into 40 5 times with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 2343569.5
Deduct 35 from 40 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 10:
When dividing 50 by 7, we get 7 with a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 2343569.57
If we take 49 away from 50, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 11:
7 can be fit into 10 1 times, resulting in a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 2343569.571
The remainder is 3 after subtracting 7 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 12:
When dividing 30 by 7, we get 4 with a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 2343569.5714
Subtracting 28 from 30 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.

On to step 13:
The number 7 fits into 20 2 times, leaving a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 2343569.57142
Subtracting 14 from 20 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 14:
When dividing 60 by 7, we get 8 with a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 2343569.571428
If we take 56 away from 60, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 15:
When dividing 40 by 7, we get 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 2343569.5714285
If we subtract 35 from 40, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 16:
7 can be fit into 50 7 times, resulting in a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 2343569.57142857
Subtract 49 from 50 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

After the division, we end up with 2343569.57142857 and a remainder of 1e-09.