Do you hate math？Well，you might change your mind on March 14.It is Pi Day，an American holiday that celebrates the number "π".
    Pi describes the ratio of a circle's circumference to its diameter （圓的周長(zhǎng)與直徑的比值）.It is about 3.14，but the number goes on endlessly.It is sometimes written in Greek，like so：π.People celebrate Pi Day by eating and throwing pies and holding math-related（與圓有關(guān)的） activjye.aiies.It's a favourite day among math teachers.On this day，class usually begins with a discussion of the number.Students try to remember as many digits of pi as they can.Then they will eat a piece or two of delicious pie!
    Restaurants offer special deals on pies for the day.You can buy a pizza for just ＄3.14 at some pizza chains.
    NACA has a "Pi In the sky" activity every year.It encourages students from 5th to 12th grade to work out real-world problems using pi.This year，students were asked to use pi to calculate（計(jì)算） the perfect spot （地點(diǎn)）to land on Mars，according to dogonews.jye.ai.

（1）How do they celebrate the day？

People celebrate Pi Day by eating and throwing pies and holding math-related activities.

People celebrate Pi Day by eating and throwing pies and holding math-related activities.

（2）What did NACA ask students to do this year？

This year，students were asked to use pi to calculate the perfect spot to land on Mars.

This year，students were asked to use pi to calculate the perfect spot to land on Mars.

（3）If you are an American student，do you want to remember more digits of pi？Why or why not？

Yes，because I want to have more math knowledge.

Yes，because I want to have more math knowledge.