42821189 ÷ 987 
We want to divide 42821189 by 987.

On to step 1:
If we divide 4 by 987, we get 0 and a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 987

Step 2:
987 can be fit into 42 0 times, resulting in a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Fetch the next digit (8) from the dividend, attach it to 42 and continue: 428 / 987

Let's proceed to step 3:
The number 987 fits into 428 0 times, leaving a remainder of 428.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 428, we get 428.
Fetch the next digit (2) from the dividend, attach it to 428 and continue: 4282 / 987

Step 4:
4282 divided by 987 is 4 with a remainder of 334.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we take 3948 away from 4282, we end up with 334.
Grab the next digit (1) from the dividend, add it to 334, then carry on: 3341 / 987

On to step 5:
The number 987 fits into 3341 3 times, leaving a remainder of 380.
The number 3 becomes the next digit in our result. 
Result so far: 43.0
Subtract 2961 from 3341 to get 380.
Include the next digit (1) from the dividend after 380, then repeat: 3801 / 987

Let's proceed to step 6:
The number 987 fits into 3801 3 times, leaving a remainder of 840.
The number 3 becomes the next digit in our result. 
Result so far: 433.0
Deduct 2961 from 3801 and we're left with 840.
Include the next digit (8) from the dividend after 840, then repeat: 8408 / 987

Going ahead to step 7:
987 goes into 8408 8 times with a remainder of 512.
Record the quotient 8 as the next digit in the result. 
Result so far: 4338.0
Subtract 7896 from 8408 to get 512.
Grab the next digit (9) from the dividend, add it to 512, then carry on: 5129 / 987

Step 8:
987 can be fit into 5129 5 times, resulting in a remainder of 194.
Record the quotient 5 as the next digit in the result. 
Result so far: 43385.0
If we subtract 4935 from 5129, we get 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

Going ahead to step 9:
The number 987 fits into 1940 1 times, leaving a remainder of 953.
The next digit of our result is 1. 
Result so far: 43385.1
If we take 987 away from 1940, we end up with 953.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9530, and continue the process.

Step 10:
9530 divided by 987 is 9 with a remainder of 647.
Use 9 as the next digit of our solution. 
Result so far: 43385.19
The remainder is 647 after subtracting 8883 from 9530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6470, and continue the process.

Moving on to step 11:
6470 divided by 987 is 6 with a remainder of 548.
The number 6 becomes the next digit in our result. 
Result so far: 43385.196
If we take 5922 away from 6470, we end up with 548.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5480, and continue the process.

Moving on to step 12:
5480 divided by 987 is 5 with a remainder of 545.
The number 5 becomes the next digit in our result. 
Result so far: 43385.1965
Subtracting 4935 from 5480 leaves us with 545.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5450, and continue the process.

Advancing to step 13:
If we divide 5450 by 987, we get 5 and a remainder of 515.
The number 5 becomes the next digit in our result. 
Result so far: 43385.19655
Deduct 4935 from 5450 and we're left with 515.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5150, and continue the process.

The final result is 43385.19655 with a remainder of 0.000515.