We look at the division of 400858 by 72 
We want to figure out the number of times 400858 can be divided by 72.

Going ahead to step 1:
If we divide 4 by 72, we get 0 and a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 72

On to step 2:
72 goes into 40 0 times with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 40, we get 40.
Append the next digit (0) from the dividend to 40 and continue with: 400 / 72

On to step 3:
400 divided by 72 is 5 with a remainder of 40.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
The remainder is 40 after subtracting 360 from 400.
Grab the next digit (8) from the dividend, add it to 40, then carry on: 408 / 72

Advancing to step 4:
72 can be fit into 408 5 times, resulting in a remainder of 48.
The next digit of our result is 5. 
Result so far: 55.0
If we subtract 360 from 408, we get 48.
Grab the next digit (5) from the dividend, add it to 48, then carry on: 485 / 72

Step 5:
If we divide 485 by 72, we get 6 and a remainder of 53.
Write down 6 as next digit of the result. 
Result so far: 556.0
Subtract 432 from 485 to get 53.
Take the next digit (8) from the dividend and append it to 53, then repeat: 538 / 72

Moving on to step 6:
538 divided by 72 is 7 with a remainder of 34.
The next digit of our result is 7. 
Result so far: 5567.0
If we subtract 504 from 538, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 7:
340 divided by 72 is 4 with a remainder of 52.
The next digit of our result is 4. 
Result so far: 5567.4
Deduct 288 from 340 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 8:
When dividing 520 by 72, we get 7 with a remainder of 16.
Write down 7 as next digit of the result. 
Result so far: 5567.47
The remainder is 16 after subtracting 504 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 9:
The number 72 fits into 160 2 times, leaving a remainder of 16.
Record the quotient 2 as the next digit in the result. 
Result so far: 5567.472
The remainder is 16 after subtracting 144 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 10:
The number 72 fits into 160 2 times, leaving a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 5567.4722
If we take 144 away from 160, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

After the division, we end up with 5567.4722 and a remainder of 0.00016.