21153759 ÷ 60 
The aim is to understand the frequency of 60 in 21153759.

On to step 1:
60 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 60

Let's proceed to step 2:
60 goes into 21 0 times with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Bring next digit (1) of the dividend behind the 21 and repeat the process: 211 / 60

Let's proceed to step 3:
The number 60 fits into 211 3 times, leaving a remainder of 31.
Write down 3 as next digit of the result. 
Result so far: 3.0
Deduct 180 from 211 and we're left with 31.
Append the next digit (5) from the dividend to 31 and continue with: 315 / 60

Moving on to step 4:
The number 60 fits into 315 5 times, leaving a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 35.0
Subtracting 300 from 315 leaves us with 15.
Bring next digit (3) of the dividend behind the 15 and repeat the process: 153 / 60

Let's proceed to step 5:
153 divided by 60 is 2 with a remainder of 33.
Put 2 as the next digit of the answer. 
Result so far: 352.0
Subtracting 120 from 153 leaves us with 33.
Take the next digit (7) from the dividend and append it to 33, then repeat: 337 / 60

Advancing to step 6:
337 divided by 60 is 5 with a remainder of 37.
Record the quotient 5 as the next digit in the result. 
Result so far: 3525.0
If we take 300 away from 337, we end up with 37.
Bring next digit (5) of the dividend behind the 37 and repeat the process: 375 / 60

Advancing to step 7:
60 can be fit into 375 6 times, resulting in a remainder of 15.
The next digit of our result is 6. 
Result so far: 35256.0
Subtract 360 from 375 to get 15.
Append the next digit (9) from the dividend to 15 and continue with: 159 / 60

On to step 8:
When dividing 159 by 60, we get 2 with a remainder of 39.
The next digit of our result is 2. 
Result so far: 352562.0
If we take 120 away from 159, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Going ahead to step 9:
When dividing 390 by 60, we get 6 with a remainder of 30.
Record the quotient 6 as the next digit in the result. 
Result so far: 352562.6
Subtracting 360 from 390 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 10:
The number 60 fits into 300 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 352562.65
Deduct 300 from 300 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 11:
If we divide 0 by 60, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 352562.65
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 12:
60 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 352562.65
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 352562.65 with a balance of 0.0.