Our school planted trees 4 times last year, 80 trees each time, and 4 times this year, 90 trees each time. Ask math questions and answer them. You can ask as many math questions as you can! After asking a question, choose a question answer that you like.
咱们学校去年植树4次，每次植树80棵，今年也植树4次，每次植树90棵，提出数学问题并解答，你能提几个数学问题就提几个！提出问题后选择你喜欢的一个问题解答．
<gadget id="calculator">80 * 4</gadget>
<output>320</output>

<result>320</result>