From March 1st to November 30th, how many days have passed?
从3月1日到11月30日，经过了几天？
<gadget id="calculator">31 * 5</gadget>
<output>155</output>

<gadget id="calculator">30 * 4</gadget>
<output>120</output>

<gadget id="calculator">155 + 120</gadget>
<output>275</output>

<result>275</result>