In order to purchase teaching equipment, the school spent 20,000 yuan last year, 120 yuan less than this year's (4/5) expenditure. How much did you spend this year? ．
为添置教学设备，学校去年支出了20000元，比今年支出的(4/5)少120元．今年支出多少元？．
<gadget id="calculator">20_000 + 120</gadget>
<output>20_120</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">20_120 / (4/5)</gadget>
<output>25_150</output>

<result>25_150</result>