Xiaoxiao’s family spent 800 yuan on food last month, accounting for 40% of the total expenditure last month, and water and electricity expenses accounted for 15% of the total expenditure last month. How much did Xiaoxiao’s household spend on water and electricity last month?
笑笑家上个月食品支出800元，占上月总支出的40%，水电气支出占上月总支出的15%，笑笑家上个月水电气支出多少钱？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">800 / (2/5)</gadget>
<output>2_000</output>

<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">2_000 * (3/20)</gadget>
<output>300</output>

<result>300</result>