Mr. Li’s household expenditure was 2,500 yuan last month, and this month is 1/5 less than last month. How much is Mr. Li’s household expenditure this month?
李老师上月家庭开支2500元，这个月比上个月节约(1/5)，李老师这个月家庭开支多少元？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2_500 * (4/5)</gadget>
<output>2_000</output>

<result>2_000</result>