21738726 ÷ 387 
We're looking to find how many times 387 goes into 21738726.

Going ahead to step 1:
2 divided by 387 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 387

On to step 2:
387 can be fit into 21 0 times, resulting in a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Append the next digit (7) from the dividend to 21 and continue with: 217 / 387

Step 3:
387 can be fit into 217 0 times, resulting in a remainder of 217.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 217, we get 217.
Take the next digit (3) from the dividend and append it to 217, then repeat: 2173 / 387

Advancing to step 4:
387 can be fit into 2173 5 times, resulting in a remainder of 238.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
The remainder is 238 after subtracting 1935 from 2173.
Include the next digit (8) from the dividend after 238, then repeat: 2388 / 387

Moving on to step 5:
387 can be fit into 2388 6 times, resulting in a remainder of 66.
Record the quotient 6 as the next digit in the result. 
Result so far: 56.0
If we subtract 2322 from 2388, we get 66.
Append the next digit (7) from the dividend to 66 and continue with: 667 / 387

Advancing to step 6:
387 can be fit into 667 1 times, resulting in a remainder of 280.
Record the quotient 1 as the next digit in the result. 
Result so far: 561.0
Subtract 387 from 667 to get 280.
Bring next digit (2) of the dividend behind the 280 and repeat the process: 2802 / 387

On to step 7:
2802 divided by 387 is 7 with a remainder of 93.
Put 7 as the next digit of the answer. 
Result so far: 5617.0
Subtract 2709 from 2802 to get 93.
Append the next digit (6) from the dividend to 93 and continue with: 936 / 387

Moving on to step 8:
387 can be fit into 936 2 times, resulting in a remainder of 162.
Write down 2 as next digit of the result. 
Result so far: 56172.0
If we subtract 774 from 936, we get 162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Let's proceed to step 9:
If we divide 1620 by 387, we get 4 and a remainder of 72.
The next digit of our result is 4. 
Result so far: 56172.4
The remainder is 72 after subtracting 1548 from 1620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Let's proceed to step 10:
387 can be fit into 720 1 times, resulting in a remainder of 333.
The next digit of our result is 1. 
Result so far: 56172.41
Subtracting 387 from 720 leaves us with 333.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3330, and continue the process.

Step 11:
The number 387 fits into 3330 8 times, leaving a remainder of 234.
Use 8 as the next digit of our solution. 
Result so far: 56172.418
Subtract 3096 from 3330 to get 234.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

Moving on to step 12:
387 goes into 2340 6 times with a remainder of 18.
The number 6 becomes the next digit in our result. 
Result so far: 56172.4186
If we take 2322 away from 2340, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 13:
180 divided by 387 is 0 with a remainder of 180.
Record the quotient 0 as the next digit in the result. 
Result so far: 56172.4186
Subtract 0 from 180 to get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Going ahead to step 14:
The number 387 fits into 1800 4 times, leaving a remainder of 252.
The number 4 becomes the next digit in our result. 
Result so far: 56172.418604
Subtracting 1548 from 1800 leaves us with 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

Let's proceed to step 15:
If we divide 2520 by 387, we get 6 and a remainder of 198.
Put 6 as the next digit of the answer. 
Result so far: 56172.4186046
Subtracting 2322 from 2520 leaves us with 198.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1980, and continue the process.

Step 16:
387 goes into 1980 5 times with a remainder of 45.
The next digit of our result is 5. 
Result so far: 56172.41860465
Subtract 1935 from 1980 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

The final outcome is 56172.41860465, with a leftover of 4.5e-08.