66072545 ÷ 400 
We're looking to find how many times 400 goes into 66072545.

Going ahead to step 1:
6 divided by 400 is 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 400

Moving on to step 2:
400 goes into 66 0 times with a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Take the next digit (0) from the dividend and append it to 66, then repeat: 660 / 400

Moving on to step 3:
660 divided by 400 is 1 with a remainder of 260.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 260 after subtracting 400 from 660.
Include the next digit (7) from the dividend after 260, then repeat: 2607 / 400

Step 4:
400 goes into 2607 6 times with a remainder of 207.
Write down 6 as next digit of the result. 
Result so far: 16.0
The remainder is 207 after subtracting 2400 from 2607.
Fetch the next digit (2) from the dividend, attach it to 207 and continue: 2072 / 400

Moving on to step 5:
2072 divided by 400 is 5 with a remainder of 72.
The number 5 becomes the next digit in our result. 
Result so far: 165.0
Subtracting 2000 from 2072 leaves us with 72.
Bring next digit (5) of the dividend behind the 72 and repeat the process: 725 / 400

Going ahead to step 6:
400 can be fit into 725 1 times, resulting in a remainder of 325.
Use 1 as the next digit of our solution. 
Result so far: 1651.0
Deduct 400 from 725 and we're left with 325.
Append the next digit (4) from the dividend to 325 and continue with: 3254 / 400

On to step 7:
3254 divided by 400 is 8 with a remainder of 54.
Write down 8 as next digit of the result. 
Result so far: 16518.0
If we take 3200 away from 3254, we end up with 54.
Take the next digit (5) from the dividend and append it to 54, then repeat: 545 / 400

Going ahead to step 8:
If we divide 545 by 400, we get 1 and a remainder of 145.
Put 1 as the next digit of the answer. 
Result so far: 165181.0
If we subtract 400 from 545, we get 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Let's proceed to step 9:
The number 400 fits into 1450 3 times, leaving a remainder of 250.
Use 3 as the next digit of our solution. 
Result so far: 165181.3
If we take 1200 away from 1450, we end up with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Going ahead to step 10:
If we divide 2500 by 400, we get 6 and a remainder of 100.
Record the quotient 6 as the next digit in the result. 
Result so far: 165181.36
Deduct 2400 from 2500 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Let's proceed to step 11:
1000 divided by 400 is 2 with a remainder of 200.
Record the quotient 2 as the next digit in the result. 
Result so far: 165181.362
Subtracting 800 from 1000 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Let's proceed to step 12:
If we divide 2000 by 400, we get 5 and a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 165181.3625
Subtracting 2000 from 2000 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 13:
0 divided by 400 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 165181.3625
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 14:
400 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 165181.3625
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 165181.3625 with a balance of 0.0.