21925431 ÷ 690 
We want to figure out the number of times 21925431 can be divided by 690.

Let's proceed to step 1:
690 goes into 2 0 times with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 690

Moving on to step 2:
21 divided by 690 is 0 with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Fetch the next digit (9) from the dividend, attach it to 21 and continue: 219 / 690

On to step 3:
690 goes into 219 0 times with a remainder of 219.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 219, we end up with 219.
Append the next digit (2) from the dividend to 219 and continue with: 2192 / 690

Advancing to step 4:
690 goes into 2192 3 times with a remainder of 122.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 2070 from 2192 to get 122.
Grab the next digit (5) from the dividend, add it to 122, then carry on: 1225 / 690

Going ahead to step 5:
1225 divided by 690 is 1 with a remainder of 535.
The next digit of our result is 1. 
Result so far: 31.0
Subtracting 690 from 1225 leaves us with 535.
Include the next digit (4) from the dividend after 535, then repeat: 5354 / 690

Moving on to step 6:
When dividing 5354 by 690, we get 7 with a remainder of 524.
Record the quotient 7 as the next digit in the result. 
Result so far: 317.0
If we subtract 4830 from 5354, we get 524.
Take the next digit (3) from the dividend and append it to 524, then repeat: 5243 / 690

On to step 7:
5243 divided by 690 is 7 with a remainder of 413.
The next digit of our result is 7. 
Result so far: 3177.0
Subtracting 4830 from 5243 leaves us with 413.
Grab the next digit (1) from the dividend, add it to 413, then carry on: 4131 / 690

Moving on to step 8:
690 can be fit into 4131 5 times, resulting in a remainder of 681.
The number 5 becomes the next digit in our result. 
Result so far: 31775.0
If we take 3450 away from 4131, we end up with 681.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6810, and continue the process.

Going ahead to step 9:
When dividing 6810 by 690, we get 9 with a remainder of 600.
The number 9 becomes the next digit in our result. 
Result so far: 31775.9
If we subtract 6210 from 6810, we get 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Moving on to step 10:
6000 divided by 690 is 8 with a remainder of 480.
Record the quotient 8 as the next digit in the result. 
Result so far: 31775.98
Subtract 5520 from 6000 to get 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Moving on to step 11:
690 goes into 4800 6 times with a remainder of 660.
The next digit of our result is 6. 
Result so far: 31775.986
Subtracting 4140 from 4800 leaves us with 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6600, and continue the process.

Let's proceed to step 12:
The number 690 fits into 6600 9 times, leaving a remainder of 390.
Put 9 as the next digit of the answer. 
Result so far: 31775.9869
Deduct 6210 from 6600 and we're left with 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Advancing to step 13:
690 goes into 3900 5 times with a remainder of 450.
The next digit of our result is 5. 
Result so far: 31775.98695
Subtract 3450 from 3900 to get 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Moving on to step 14:
The number 690 fits into 4500 6 times, leaving a remainder of 360.
Put 6 as the next digit of the answer. 
Result so far: 31775.986956
If we subtract 4140 from 4500, we get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Moving on to step 15:
When dividing 3600 by 690, we get 5 with a remainder of 150.
Record the quotient 5 as the next digit in the result. 
Result so far: 31775.9869565
Subtracting 3450 from 3600 leaves us with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Step 16:
1500 divided by 690 is 2 with a remainder of 120.
Put 2 as the next digit of the answer. 
Result so far: 31775.98695652
Deduct 1380 from 1500 and we're left with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Our division results in 31775.98695652 with a remaining 1.2e-07.