The transportation company transported a batch of trees, the first time (1/7), and the second time (1/5), there are still 230 trees that have not been transported. How many saplings are there in this batch?
运输公司运一批树，第一次运了(1/7)，第二次运了(1/5)，还剩230棵没有运，这批树苗一共有多少棵？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/7) - (1/5)</gadget>
<output>23/35 = around 0.657143</output>

<gadget id="calculator">230 / (23/35)</gadget>
<output>350</output>

<result>350</result>