**Answer:**

The answer is **54325**

**Given: **

1=5

2=25

3=325

4=4325

5=54325

**Solution**

If you see all the last digits in RHS are 5 and the remaining digits are arranged in descending order of the number given in LHS with the condition total digits in RHS match the number present in LHS.

Therefore the answer is 5 = 54325