We're dividing 43586771 by 870 
Our goal is to divide 43586771 by 870.

Step 1:
870 can be fit into 4 0 times, resulting in a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Grab the next digit (3) from the dividend, add it to 4, then carry on: 43 / 870

Step 2:
43 divided by 870 is 0 with a remainder of 43.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 43 and we're left with 43.
Grab the next digit (5) from the dividend, add it to 43, then carry on: 435 / 870

Going ahead to step 3:
If we divide 435 by 870, we get 0 and a remainder of 435.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 435 to get 435.
Fetch the next digit (8) from the dividend, attach it to 435 and continue: 4358 / 870

Let's proceed to step 4:
The number 870 fits into 4358 5 times, leaving a remainder of 8.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
The remainder is 8 after subtracting 4350 from 4358.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 870

Going ahead to step 5:
If we divide 86 by 870, we get 0 and a remainder of 86.
Write down 0 as next digit of the result. 
Result so far: 50.0
Subtract 0 from 86 to get 86.
Fetch the next digit (7) from the dividend, attach it to 86 and continue: 867 / 870

Step 6:
When dividing 867 by 870, we get 0 with a remainder of 867.
The number 0 becomes the next digit in our result. 
Result so far: 500.0
Subtract 0 from 867 to get 867.
Bring next digit (7) of the dividend behind the 867 and repeat the process: 8677 / 870

Advancing to step 7:
8677 divided by 870 is 9 with a remainder of 847.
Record the quotient 9 as the next digit in the result. 
Result so far: 5009.0
The remainder is 847 after subtracting 7830 from 8677.
Fetch the next digit (1) from the dividend, attach it to 847 and continue: 8471 / 870

Moving on to step 8:
8471 divided by 870 is 9 with a remainder of 641.
Put 9 as the next digit of the answer. 
Result so far: 50099.0
If we take 7830 away from 8471, we end up with 641.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6410, and continue the process.

Going ahead to step 9:
The number 870 fits into 6410 7 times, leaving a remainder of 320.
The number 7 becomes the next digit in our result. 
Result so far: 50099.7
The remainder is 320 after subtracting 6090 from 6410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

On to step 10:
870 goes into 3200 3 times with a remainder of 590.
Use 3 as the next digit of our solution. 
Result so far: 50099.73
Subtract 2610 from 3200 to get 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

Going ahead to step 11:
When dividing 5900 by 870, we get 6 with a remainder of 680.
Use 6 as the next digit of our solution. 
Result so far: 50099.736
The remainder is 680 after subtracting 5220 from 5900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

Step 12:
6800 divided by 870 is 7 with a remainder of 710.
Use 7 as the next digit of our solution. 
Result so far: 50099.7367
Deduct 6090 from 6800 and we're left with 710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7100, and continue the process.

On to step 13:
The number 870 fits into 7100 8 times, leaving a remainder of 140.
The number 8 becomes the next digit in our result. 
Result so far: 50099.73678
If we take 6960 away from 7100, we end up with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Step 14:
If we divide 1400 by 870, we get 1 and a remainder of 530.
The next digit of our result is 1. 
Result so far: 50099.736781
If we take 870 away from 1400, we end up with 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5300, and continue the process.

Let's proceed to step 15:
870 can be fit into 5300 6 times, resulting in a remainder of 80.
Put 6 as the next digit of the answer. 
Result so far: 50099.7367816
Deduct 5220 from 5300 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 16:
800 divided by 870 is 0 with a remainder of 800.
The number 0 becomes the next digit in our result. 
Result so far: 50099.7367816
The remainder is 800 after subtracting 0 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8000, and continue the process.

The final outcome is 50099.7367816, with a leftover of 8e-07.