We're dividing 70840086 by 408 
Let's see how many times 408 fits into 70840086.

Going ahead to step 1:
If we divide 7 by 408, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Include the next digit (0) from the dividend after 7, then repeat: 70 / 408

Going ahead to step 2:
If we divide 70 by 408, we get 0 and a remainder of 70.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 70 and we're left with 70.
Include the next digit (8) from the dividend after 70, then repeat: 708 / 408

Going ahead to step 3:
408 goes into 708 1 times with a remainder of 300.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 408 from 708 and we're left with 300.
Include the next digit (4) from the dividend after 300, then repeat: 3004 / 408

Advancing to step 4:
3004 divided by 408 is 7 with a remainder of 148.
Write down 7 as next digit of the result. 
Result so far: 17.0
If we take 2856 away from 3004, we end up with 148.
Bring next digit (0) of the dividend behind the 148 and repeat the process: 1480 / 408

On to step 5:
1480 divided by 408 is 3 with a remainder of 256.
Record the quotient 3 as the next digit in the result. 
Result so far: 173.0
If we take 1224 away from 1480, we end up with 256.
Fetch the next digit (0) from the dividend, attach it to 256 and continue: 2560 / 408

Step 6:
2560 divided by 408 is 6 with a remainder of 112.
Write down 6 as next digit of the result. 
Result so far: 1736.0
Subtract 2448 from 2560 to get 112.
Grab the next digit (8) from the dividend, add it to 112, then carry on: 1128 / 408

Let's proceed to step 7:
408 goes into 1128 2 times with a remainder of 312.
Write down 2 as next digit of the result. 
Result so far: 17362.0
The remainder is 312 after subtracting 816 from 1128.
Append the next digit (6) from the dividend to 312 and continue with: 3126 / 408

Going ahead to step 8:
The number 408 fits into 3126 7 times, leaving a remainder of 270.
Put 7 as the next digit of the answer. 
Result so far: 173627.0
If we take 2856 away from 3126, we end up with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Step 9:
2700 divided by 408 is 6 with a remainder of 252.
Record the quotient 6 as the next digit in the result. 
Result so far: 173627.6
Subtracting 2448 from 2700 leaves us with 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

Advancing to step 10:
The number 408 fits into 2520 6 times, leaving a remainder of 72.
Record the quotient 6 as the next digit in the result. 
Result so far: 173627.66
The remainder is 72 after subtracting 2448 from 2520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

The quotient of the division is 173627.66, and the remainder is 0.072.