The total industrial output value of a township this year is 84 million yuan, 20% more than last year. How much was the total industrial output value last year?
某乡今年的工业总产值8400万元，比去年多20%，去年的工业总产值是多少万元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">8_400 / (6/5)</gadget>
<output>7_000</output>

<result>7_000</result>