The output value of the garment factory in the first half of this year was 810,000 yuan, an increase (1/3) compared to the first half of last year. How much was the output value in the first half of last year?
服装厂今年上半年的产值是81万元，比去年上半年增长(1/3)，去年上半年的产值是多少万元？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">81 / (4/3)</gadget>
<output>243/4 = around 60.75</output>

<result>243/4 = around 60.75</result>