Well, it's time to stretch your brain a little. We invite you to solve a simple problem with clocks, calculators and light bulbs. At first glance, everything looks simple. But... there are some pitfalls. Look closely at the details, and you will easily crack everything. The second time for sure.
This problem has at least five pitfalls that you might not notice if you don't crack such pictures every day and have already trained your eyes.
At the end of the calculation, you may need a calculator - this is normal, this is how it was intended. You are on the right track.
THE ANSWER WILL BE AT THE END OF THE POST
ANSWER: 333