76287880 ÷ 420 
We want to figure out the number of times 76287880 can be divided by 420.

Going ahead to step 1:
420 can be fit into 7 0 times, resulting in a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Include the next digit (6) from the dividend after 7, then repeat: 76 / 420

Step 2:
76 divided by 420 is 0 with a remainder of 76.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 76, we end up with 76.
Fetch the next digit (2) from the dividend, attach it to 76 and continue: 762 / 420

On to step 3:
When dividing 762 by 420, we get 1 with a remainder of 342.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 342 after subtracting 420 from 762.
Fetch the next digit (8) from the dividend, attach it to 342 and continue: 3428 / 420

Advancing to step 4:
When dividing 3428 by 420, we get 8 with a remainder of 68.
Put 8 as the next digit of the answer. 
Result so far: 18.0
Deduct 3360 from 3428 and we're left with 68.
Append the next digit (7) from the dividend to 68 and continue with: 687 / 420

Let's proceed to step 5:
420 can be fit into 687 1 times, resulting in a remainder of 267.
The next digit of our result is 1. 
Result so far: 181.0
If we subtract 420 from 687, we get 267.
Include the next digit (8) from the dividend after 267, then repeat: 2678 / 420

Moving on to step 6:
If we divide 2678 by 420, we get 6 and a remainder of 158.
Use 6 as the next digit of our solution. 
Result so far: 1816.0
Subtracting 2520 from 2678 leaves us with 158.
Append the next digit (8) from the dividend to 158 and continue with: 1588 / 420

Step 7:
If we divide 1588 by 420, we get 3 and a remainder of 328.
Record the quotient 3 as the next digit in the result. 
Result so far: 18163.0
If we take 1260 away from 1588, we end up with 328.
Append the next digit (0) from the dividend to 328 and continue with: 3280 / 420

Moving on to step 8:
420 goes into 3280 7 times with a remainder of 340.
Record the quotient 7 as the next digit in the result. 
Result so far: 181637.0
Subtract 2940 from 3280 to get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Going ahead to step 9:
420 goes into 3400 8 times with a remainder of 40.
Use 8 as the next digit of our solution. 
Result so far: 181637.8
Deduct 3360 from 3400 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 10:
400 divided by 420 is 0 with a remainder of 400.
Record the quotient 0 as the next digit in the result. 
Result so far: 181637.8
The remainder is 400 after subtracting 0 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Going ahead to step 11:
420 can be fit into 4000 9 times, resulting in a remainder of 220.
Record the quotient 9 as the next digit in the result. 
Result so far: 181637.809
If we subtract 3780 from 4000, we get 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Step 12:
When dividing 2200 by 420, we get 5 with a remainder of 100.
Put 5 as the next digit of the answer. 
Result so far: 181637.8095
Subtract 2100 from 2200 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Going ahead to step 13:
420 can be fit into 1000 2 times, resulting in a remainder of 160.
The number 2 becomes the next digit in our result. 
Result so far: 181637.80952
Subtracting 840 from 1000 leaves us with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Advancing to step 14:
420 goes into 1600 3 times with a remainder of 340.
Write down 3 as next digit of the result. 
Result so far: 181637.809523
Subtract 1260 from 1600 to get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Advancing to step 15:
If we divide 3400 by 420, we get 8 and a remainder of 40.
Write down 8 as next digit of the result. 
Result so far: 181637.8095238
If we take 3360 away from 3400, we end up with 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 16:
400 divided by 420 is 0 with a remainder of 400.
Write down 0 as next digit of the result. 
Result so far: 181637.8095238
Subtract 0 from 400 to get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

The final result is 181637.8095238 with a remainder of 4e-07.