Let's divide 21400061 by 387
We want to divide 21400061 by 387.

Step 1:
387 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 387

Advancing to step 2:
21 divided by 387 is 0 with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Fetch the next digit (4) from the dividend, attach it to 21 and continue: 214 / 387

Moving on to step 3:
387 goes into 214 0 times with a remainder of 214.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 214 and we're left with 214.
Grab the next digit (0) from the dividend, add it to 214, then carry on: 2140 / 387

Advancing to step 4:
The number 387 fits into 2140 5 times, leaving a remainder of 205.
Write down 5 as next digit of the result. 
Result so far: 5.0
Deduct 1935 from 2140 and we're left with 205.
Take the next digit (0) from the dividend and append it to 205, then repeat: 2050 / 387

Moving on to step 5:
387 goes into 2050 5 times with a remainder of 115.
Write down 5 as next digit of the result. 
Result so far: 55.0
Subtract 1935 from 2050 to get 115.
Grab the next digit (0) from the dividend, add it to 115, then carry on: 1150 / 387

Let's proceed to step 6:
The number 387 fits into 1150 2 times, leaving a remainder of 376.
Use 2 as the next digit of our solution. 
Result so far: 552.0
The remainder is 376 after subtracting 774 from 1150.
Include the next digit (6) from the dividend after 376, then repeat: 3766 / 387

On to step 7:
387 goes into 3766 9 times with a remainder of 283.
Use 9 as the next digit of our solution. 
Result so far: 5529.0
If we take 3483 away from 3766, we end up with 283.
Grab the next digit (1) from the dividend, add it to 283, then carry on: 2831 / 387

Advancing to step 8:
If we divide 2831 by 387, we get 7 and a remainder of 122.
Put 7 as the next digit of the answer. 
Result so far: 55297.0
The remainder is 122 after subtracting 2709 from 2831.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Let's proceed to step 9:
If we divide 1220 by 387, we get 3 and a remainder of 59.
Record the quotient 3 as the next digit in the result. 
Result so far: 55297.3
If we subtract 1161 from 1220, we 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.

Moving on to step 10:
590 divided by 387 is 1 with a remainder of 203.
Write down 1 as next digit of the result. 
Result so far: 55297.31
If we take 387 away from 590, we end up with 203.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

Let's proceed to step 11:
2030 divided by 387 is 5 with a remainder of 95.
Use 5 as the next digit of our solution. 
Result so far: 55297.315
The remainder is 95 after subtracting 1935 from 2030.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Moving on to step 12:
387 goes into 950 2 times with a remainder of 176.
Record the quotient 2 as the next digit in the result. 
Result so far: 55297.3152
If we take 774 away from 950, we end up with 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Moving on to step 13:
387 can be fit into 1760 4 times, resulting in a remainder of 212.
Record the quotient 4 as the next digit in the result. 
Result so far: 55297.31524
If we subtract 1548 from 1760, we get 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

Step 14:
387 goes into 2120 5 times with a remainder of 185.
Put 5 as the next digit of the answer. 
Result so far: 55297.315245
If we subtract 1935 from 2120, we get 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Going ahead to step 15:
1850 divided by 387 is 4 with a remainder of 302.
The next digit of our result is 4. 
Result so far: 55297.3152454
Deduct 1548 from 1850 and we're left with 302.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3020, and continue the process.

Advancing to step 16:
387 goes into 3020 7 times with a remainder of 311.
The number 7 becomes the next digit in our result. 
Result so far: 55297.31524547
Subtracting 2709 from 3020 leaves us with 311.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3110, and continue the process.

The final result is 55297.31524547 with a remainder of 3.11e-07.