87280420 ÷ 402 
We want to figure out the number of times 87280420 can be divided by 402.

On to step 1:
8 divided by 402 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 402

Going ahead to step 2:
When dividing 87 by 402, we get 0 with a remainder of 87.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 87, we end up with 87.
Fetch the next digit (2) from the dividend, attach it to 87 and continue: 872 / 402

On to step 3:
402 goes into 872 2 times with a remainder of 68.
The next digit of our result is 2. 
Result so far: 2.0
If we take 804 away from 872, we end up with 68.
Include the next digit (8) from the dividend after 68, then repeat: 688 / 402

On to step 4:
When dividing 688 by 402, we get 1 with a remainder of 286.
Put 1 as the next digit of the answer. 
Result so far: 21.0
If we subtract 402 from 688, we get 286.
Append the next digit (0) from the dividend to 286 and continue with: 2860 / 402

Let's proceed to step 5:
402 goes into 2860 7 times with a remainder of 46.
The number 7 becomes the next digit in our result. 
Result so far: 217.0
The remainder is 46 after subtracting 2814 from 2860.
Bring next digit (4) of the dividend behind the 46 and repeat the process: 464 / 402

Going ahead to step 6:
402 goes into 464 1 times with a remainder of 62.
Record the quotient 1 as the next digit in the result. 
Result so far: 2171.0
Subtract 402 from 464 to get 62.
Append the next digit (2) from the dividend to 62 and continue with: 622 / 402

Moving on to step 7:
622 divided by 402 is 1 with a remainder of 220.
Use 1 as the next digit of our solution. 
Result so far: 21711.0
Subtracting 402 from 622 leaves us with 220.
Fetch the next digit (0) from the dividend, attach it to 220 and continue: 2200 / 402

Advancing to step 8:
When dividing 2200 by 402, we get 5 with a remainder of 190.
The next digit of our result is 5. 
Result so far: 217115.0
If we subtract 2010 from 2200, we get 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Going ahead to step 9:
402 can be fit into 1900 4 times, resulting in a remainder of 292.
The next digit of our result is 4. 
Result so far: 217115.4
If we subtract 1608 from 1900, we get 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Advancing to step 10:
The number 402 fits into 2920 7 times, leaving a remainder of 106.
The number 7 becomes the next digit in our result. 
Result so far: 217115.47
Subtract 2814 from 2920 to get 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

Going ahead to step 11:
If we divide 1060 by 402, we get 2 and a remainder of 256.
Put 2 as the next digit of the answer. 
Result so far: 217115.472
The remainder is 256 after subtracting 804 from 1060.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Moving on to step 12:
402 goes into 2560 6 times with a remainder of 148.
The next digit of our result is 6. 
Result so far: 217115.4726
Subtract 2412 from 2560 to get 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Moving on to step 13:
1480 divided by 402 is 3 with a remainder of 274.
Write down 3 as next digit of the result. 
Result so far: 217115.47263
Subtract 1206 from 1480 to get 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

Moving on to step 14:
The number 402 fits into 2740 6 times, leaving a remainder of 328.
The next digit of our result is 6. 
Result so far: 217115.472636
Subtracting 2412 from 2740 leaves us with 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

Let's proceed to step 15:
When dividing 3280 by 402, we get 8 with a remainder of 64.
Use 8 as the next digit of our solution. 
Result so far: 217115.4726368
Subtracting 3216 from 3280 leaves us with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Step 16:
The number 402 fits into 640 1 times, leaving a remainder of 238.
Use 1 as the next digit of our solution. 
Result so far: 217115.47263681
Subtracting 402 from 640 leaves us with 238.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2380, and continue the process.

The final result is 217115.47263681 with a remainder of 2.38e-07.