A certain ceramics factory exported 8.5 million US dollars last year, which was (5/4) times that of the previous year. How many tens of thousands of US dollars was earned from exports in the previous year?
某陶瓷厂去年出口创汇850万美元，是前年的(5/4)倍．前年出口创汇多少万美元？
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">850 / (5/4)</gadget>
<output>680</output>

<result>680</result>