Yunlong Township raised 1,600 cattle this year, an increase of (1/7) compared to last year. How many cattle did Yunlong Township raise last year?
云龙乡今年养牛1600头，比去年增加(1/7)，云龙乡去年养牛多少头？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 + (1/7)</gadget>
<output>8/7 = around 1.142857</output>

<gadget id="calculator">1_600 / (8/7)</gadget>
<output>1_400</output>

<result>1_400</result>