A livestock farm sells 1,500 beef cattle, accounting for 30% of the total number of beef cattle. How many beef cattle are left on the farm.
一个畜牧场卖出肉牛1500头，占肉牛总头数的30%．该畜牧场还剩肉牛多少头．
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1_500 / (3/10)</gadget>
<output>5_000</output>

<gadget id="calculator">5_000 - 1_500</gadget>
<output>3_500</output>

<result>3_500</result>