Let's divide 6400066 by 840
We want to figure out the number of times 6400066 can be divided by 840.

On to step 1:
If we divide 6 by 840, we get 0 and a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 840

Moving on to step 2:
When dividing 64 by 840, we get 0 with a remainder of 64.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 64, we get 64.
Append the next digit (0) from the dividend to 64 and continue with: 640 / 840

Moving on to step 3:
If we divide 640 by 840, we get 0 and a remainder of 640.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 640, we get 640.
Take the next digit (0) from the dividend and append it to 640, then repeat: 6400 / 840

Advancing to step 4:
If we divide 6400 by 840, we get 7 and a remainder of 520.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we subtract 5880 from 6400, we get 520.
Bring next digit (0) of the dividend behind the 520 and repeat the process: 5200 / 840

On to step 5:
840 goes into 5200 6 times with a remainder of 160.
Write down 6 as next digit of the result. 
Result so far: 76.0
Deduct 5040 from 5200 and we're left with 160.
Grab the next digit (6) from the dividend, add it to 160, then carry on: 1606 / 840

Advancing to step 6:
840 can be fit into 1606 1 times, resulting in a remainder of 766.
Use 1 as the next digit of our solution. 
Result so far: 761.0
Deduct 840 from 1606 and we're left with 766.
Fetch the next digit (6) from the dividend, attach it to 766 and continue: 7666 / 840

Step 7:
If we divide 7666 by 840, we get 9 and a remainder of 106.
The next digit of our result is 9. 
Result so far: 7619.0
Subtract 7560 from 7666 to get 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

Going ahead to step 8:
If we divide 1060 by 840, we get 1 and a remainder of 220.
Record the quotient 1 as the next digit in the result. 
Result so far: 7619.1
The remainder is 220 after subtracting 840 from 1060.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

On to step 9:
The number 840 fits into 2200 2 times, leaving a remainder of 520.
Use 2 as the next digit of our solution. 
Result so far: 7619.12
The remainder is 520 after subtracting 1680 from 2200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Moving on to step 10:
If we divide 5200 by 840, we get 6 and a remainder of 160.
Put 6 as the next digit of the answer. 
Result so far: 7619.126
If we subtract 5040 from 5200, we get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Moving on to step 11:
840 goes into 1600 1 times with a remainder of 760.
The next digit of our result is 1. 
Result so far: 7619.1261
Deduct 840 from 1600 and we're left with 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7600, and continue the process.

Moving on to step 12:
840 can be fit into 7600 9 times, resulting in a remainder of 40.
The number 9 becomes the next digit in our result. 
Result so far: 7619.12619
If we subtract 7560 from 7600, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 13:
840 goes into 400 0 times with a remainder of 400.
Put 0 as the next digit of the answer. 
Result so far: 7619.12619
Deduct 0 from 400 and we're left with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Let's proceed to step 14:
840 goes into 4000 4 times with a remainder of 640.
Record the quotient 4 as the next digit in the result. 
Result so far: 7619.1261904
Subtracting 3360 from 4000 leaves us with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Let's proceed to step 15:
If we divide 6400 by 840, we get 7 and a remainder of 520.
Record the quotient 7 as the next digit in the result. 
Result so far: 7619.12619047
Subtracting 5880 from 6400 leaves us with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

In conclusion, the division gives 7619.12619047 with a balance of 5.2e-07.