There are 280 cattle in a livestock farm, and the number of sheep (3/5) is exactly equal to 30% of the cattle. How many sheep are there in this pasture?
一个畜牧场有牛280头，羊只数的(3/5)与牛的30%正好相等，这个牧场有羊多少只？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/10) / (3/5)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">280 * (1/2)</gadget>
<output>140</output>

<result>140</result>