Fangfang’s family uses an average of 5 degrees of electricity per day. How much electricity will be shared in the first quarter of this year?
芳芳家平均每天用电5度，今年第一季度共用电多少度？
<gadget id="calculator">31 + 28 + 31</gadget>
<output>90</output>

<gadget id="calculator">90 * 5</gadget>
<output>450</output>

<result>450</result>