A steel mill plans to produce 80,000 tons of steel this year, which is (1/4) more than last year. How many tons of steel was produced last year?
一个钢厂今年计划产钢80000吨，比去年增产(1/4)．去年产钢多少吨？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">80_000 / (5/4)</gadget>
<output>64_000</output>

<result>64_000</result>