<human>:  Marc bought 50 episodes of the show "Friends" online. Each day Marc watches 1/10 of the episodes he bought. How many days will Marc need to finish 50 episodes of the show he bought?
<bot>: How many episodes does Marc watch each day? ** Marc watches 50 * 1/10 = <<50*1/10=5>>5 episodes a day.
How many days will Marc need to finish all episodes he bought? ** So, he will need 50 / 5 = <<50/5=10>>10 days to finish all episodes he bought.
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