643862 ÷ 87 
We want to divide 643862 by 87.

Let's proceed to step 1:
6 divided by 87 is 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 87

Let's proceed to step 2:
87 goes into 64 0 times with a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 64, we get 64.
Grab the next digit (3) from the dividend, add it to 64, then carry on: 643 / 87

Moving on to step 3:
When dividing 643 by 87, we get 7 with a remainder of 34.
Put 7 as the next digit of the answer. 
Result so far: 7.0
Subtracting 609 from 643 leaves us with 34.
Take the next digit (8) from the dividend and append it to 34, then repeat: 348 / 87

Advancing to step 4:
348 divided by 87 is 4 with a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 74.0
Subtracting 348 from 348 leaves us with 0.
Include the next digit (6) from the dividend after 0, then repeat: 6 / 87

Step 5:
6 divided by 87 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 740.0
Subtracting 0 from 6 leaves us with 6.
Grab the next digit (2) from the dividend, add it to 6, then carry on: 62 / 87

Let's proceed to step 6:
62 divided by 87 is 0 with a remainder of 62.
The next digit of our result is 0. 
Result so far: 7400.0
If we take 0 away from 62, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 7:
87 goes into 620 7 times with a remainder of 11.
Write down 7 as next digit of the result. 
Result so far: 7400.7
The remainder is 11 after subtracting 609 from 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 8:
If we divide 110 by 87, we get 1 and a remainder of 23.
The next digit of our result is 1. 
Result so far: 7400.71
Deduct 87 from 110 and we're left with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 9:
The number 87 fits into 230 2 times, leaving a remainder of 56.
Put 2 as the next digit of the answer. 
Result so far: 7400.712
Subtracting 174 from 230 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 10:
If we divide 560 by 87, we get 6 and a remainder of 38.
The number 6 becomes the next digit in our result. 
Result so far: 7400.7126
The remainder is 38 after subtracting 522 from 560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 11:
87 goes into 380 4 times with a remainder of 32.
Write down 4 as next digit of the result. 
Result so far: 7400.71264
If we take 348 away from 380, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 12:
The number 87 fits into 320 3 times, leaving a remainder of 59.
The number 3 becomes the next digit in our result. 
Result so far: 7400.712643
Subtract 261 from 320 to get 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Step 13:
When dividing 590 by 87, we get 6 with a remainder of 68.
Put 6 as the next digit of the answer. 
Result so far: 7400.7126436
Subtract 522 from 590 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

On to step 14:
87 can be fit into 680 7 times, resulting in a remainder of 71.
Put 7 as the next digit of the answer. 
Result so far: 7400.71264367
Subtract 609 from 680 to get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

The final result is 7400.71264367 with a remainder of 7.1e-08.