The foreign exchange earned by the toy factory last year was 8.5 million US dollars, equivalent to (5/4) of the foreign exchange earned in the previous year. How many US dollars was earned in the previous year?
玩具厂去年出口创汇850万美元，相当于前年创汇的(5/4)，前年创汇多少万美元？
<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>