"Daddy, how many days are in 18 years?"
Good time to teach her about multiplication.
"If there are 365 days in a year, then you need 18 of those. It would be like counting to 365 eighteen times. That's called multiplication. You're wondering about 365 times 18."
This was not the answer she was looking for, so I turned my iTelephone into an iCalculator. "Let's see here, you take 18 times--see the 'x' there?--365. And the answer is 6,570."
Her mind was sufficiently blown.
"But wait, Lyla. With leap years added, it's more."
"What's leap year?"
"Every four years, you have a year with one extra day: 366 instead of 365. It has to do with the revolution of the earth around the sun."
She nodded, humoring me.
"So there are two possible answers. If the first year is a leap year, then there would be 6,575 days in 18 years. If the first year isn't a leap year, then there would only be 6,574 days."
"Oh."
"Hey, why did you want to know how many days are in 18 years, anyway?"
"Rapunzel looked out her window for 18 years."
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