The spring break starts from April 26th and ends on May 1st. How many days have passed?
春假从4月26日开始，到5月1日结束，一共经过多少天
<gadget id="calculator">30 - 26</gadget>
<output>4</output>

<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<result>5</result>