Convert 150 hours, 12 minutes, and 9 seconds into a different base.

$$150 \text{ hours} \div 7$$ $$150 = 7 \times 21 + 3$$

This gives $21 \text{ hours}$ with a remainder of $3 \text{ hours}$.

$$3 \text{ hours} = 3 \times 60 \text{ minutes} = 180 \text{ minutes}$$

Total minutes = $180 \text{ minutes} + 12 \text{ minutes} = 192 \text{ minutes}$.

$$192 \text{ minutes} \div 7$$ $$192 = 7 \times 27 + 3$$

This gives $27 \text{ minutes}$ with a remainder of $3 \text{ minutes}$.

$$3 \text{ minutes} = 3 \times 60 \text{ seconds} = 180 \text{ seconds}$$

Total seconds = $180 \text{ seconds} + 9 \text{ seconds} = 189 \text{ seconds}$.

$$189 \text{ seconds} \div 7$$ $$189 = 7 \times 27$$

This gives $27 \text{ seconds}$ with no remainder.

Combining the results:
The final answer is $\text{21 घंटा 27 मिनट 27 सेकंड}$.