Hello, so i have to convert 3 base number to 10 base number for recursion, so far i have code to check if the following number is in 3 base, and i have code for convert from higher base number to lower (in this case from 10 base to 7 base):

This is non recursion code for check if the number is in 3 base

```
def isit3base(X):
if(x>0):
number=X%10
X=X//10
if(number>=3):
return(False)
else:
return(True)
X=int(input("input number: "))
print(isit3base(X))
```

Converter from 10base to 7 base

```
def fromtentoseven(x):
result=" "
while(x>0):
result+=str(x%7)
x=x//7
return(int(result[::-1]))
print(fromtentoseven(512))
#result will be 1331 in 7 base
```

Now i need to convert 3 base number to 10 base number in recursion.