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Read the original question again:
Peter and Jane are each wearing a wristwatch with a second hand that takes
one minute to make one complete revolution and Peter is moving at a speed
of 0.9c with respect to Jane. When Peter observes the second hand on his
watch to have made one complete revolution, how many revolutions will Jane
observe the second hand of her watch to have made?
Peter, moving (linearly) at .9c
observes 1 minute to have passed. During the time that
Peter's watch has ticked off 1 minute AS OBSERVED BY HIM,
how many minutes does JANE observe (in her frame--assumed to
be at rest) to have ticked off on her watch?
That's what the question says to me.