You have 100 liters of broth. You need to find out how many bacteria are in 100 liters. How do you do this

You have 100 liters of broth. You need to find out how many bacteria are in 100 liters. How do you do this, given that most bacteria need to be left alive?

There are about 1000 microbes in 1 ml of solution, which means that in 100 liters there are -1,000,000,000.

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