The school purchased a batch of saplings, 210 of which accounted for (2/5) of the total number of saplings. How many saplings did the school purchase in total?
学校购买一批树苗，已经运来210株，占树苗总数的(2/5)．学校共购买树苗多少株？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">210 / (2/5)</gadget>
<output>525</output>

<result>525</result>