Олимпиадный тренинг

Задача 39049. Let's count the numbers - 02


The value of an arithmetic expression
\(3 \cdot 4^{47} + 2 \cdot 4 ^{39}+3 \cdot 4^{37 } + 2 \cdot 4^{36}+3 \cdot 4^{32}+1\)
written in the number system with base 8. How many significant zeros are in this entry?