Food expenditure accounted for 38% of the total expenditure of Daxinjia last month, and tourism expenditure accounted for 20% of the total expenditure, which was 540 yuan less than the food expenditure. How much was the total expenditure last month?
大新家上月食品支出占总支出的38%，旅游支出占总支出的20%，比食品支出少540元，上月总支出多少元？
<gadget id="calculator">38 / 100</gadget>
<output>19/50 = around 0.38</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(19/50) - (1/5)</gadget>
<output>9/50 = around 0.18</output>

<gadget id="calculator">540 / (9/50)</gadget>
<output>3_000</output>

<result>3_000</result>