42 Immediately the girl stood up and began to walk around (she was twelve years old). At this they were completely astonished.

Read Mark 5:42 Using Other Translations

And straightway the damsel arose, and walked; for she was of the age of twelve years. And they were astonished with a great astonishment.
And immediately the girl got up and began walking (for she was twelve years of age), and they were immediately overcome with amazement.
And the girl, who was twelve years old, immediately stood up and walked around! They were overwhelmed and totally amazed.