Generating a 0.1 second tick with 50MHz Clock

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a simple rule is to invert MHz to get period in microsec then count how many periods in .1 sec:

1/50 = .02 microsec (clock period)

.1 sec = .1 * 1000000 microsec

hence you need .1*1000000/.02 = 5000000 periods

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I understand the first 1/50M = .02 usec since this is the simple Time period formula T = 1/f. However i dont understand the second line, why is .1 multiplied with 1M?

thanks

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One could also say:

to count 1 second you have a count equal to the clock frequency in Hz, so to count 0.1 second the count will be the clock frequency in Hz times 0.1

or 50 MHz * 0.1sec = 5M clocks

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thats pretty simple.. so all I have to do is multiply the clock with the amount of time I need? for example for a 2 sec tick its supposed to be 50MHz * 2 sec?

Thanks