80187407 ÷ 400 
Our goal is to divide 80187407 by 400.

Going ahead to step 1:
8 divided by 400 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 400

Moving on to step 2:
The number 400 fits into 80 0 times, leaving a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 80, we end up with 80.
Bring next digit (1) of the dividend behind the 80 and repeat the process: 801 / 400

On to step 3:
When dividing 801 by 400, we get 2 with a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtract 800 from 801 to get 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 400

Step 4:
The number 400 fits into 18 0 times, leaving a remainder of 18.
Put 0 as the next digit of the answer. 
Result so far: 20.0
Deduct 0 from 18 and we're left with 18.
Bring next digit (7) of the dividend behind the 18 and repeat the process: 187 / 400

Let's proceed to step 5:
187 divided by 400 is 0 with a remainder of 187.
Put 0 as the next digit of the answer. 
Result so far: 200.0
Deduct 0 from 187 and we're left with 187.
Fetch the next digit (4) from the dividend, attach it to 187 and continue: 1874 / 400

Going ahead to step 6:
400 can be fit into 1874 4 times, resulting in a remainder of 274.
The next digit of our result is 4. 
Result so far: 2004.0
If we subtract 1600 from 1874, we get 274.
Include the next digit (0) from the dividend after 274, then repeat: 2740 / 400

On to step 7:
2740 divided by 400 is 6 with a remainder of 340.
Use 6 as the next digit of our solution. 
Result so far: 20046.0
Subtract 2400 from 2740 to get 340.
Append the next digit (7) from the dividend to 340 and continue with: 3407 / 400

Step 8:
3407 divided by 400 is 8 with a remainder of 207.
Write down 8 as next digit of the result. 
Result so far: 200468.0
If we subtract 3200 from 3407, we get 207.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2070, and continue the process.

Moving on to step 9:
400 can be fit into 2070 5 times, resulting in a remainder of 70.
Record the quotient 5 as the next digit in the result. 
Result so far: 200468.5
Subtract 2000 from 2070 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 10:
700 divided by 400 is 1 with a remainder of 300.
Write down 1 as next digit of the result. 
Result so far: 200468.51
Subtracting 400 from 700 leaves us with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Step 11:
3000 divided by 400 is 7 with a remainder of 200.
The next digit of our result is 7. 
Result so far: 200468.517
Deduct 2800 from 3000 and we're left 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:
The number 400 fits into 2000 5 times, leaving a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 200468.5175
Subtract 2000 from 2000 to get 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:
When dividing 0 by 400, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 200468.5175
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 14:
When dividing 0 by 400, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 200468.5175
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.

The final outcome is 200468.5175, with a leftover of 0.0.