The gardening team plans to plant a batch of saplings in three days. On the first day, 40% of the saplings were planted. On the second day, 50 fewer saplings were planted than on the first day. At this time, there were still 370 saplings left unplanted. How many saplings were there in this batch? tree?
园林队计划三天种一批树苗，第一天种了这批树苗的40%，第二天比第一天少种50棵，此时还剩下370棵树苗没有种，这批树苗共有多少棵？
<gadget id="calculator">370 - 40</gadget>
<output>330</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5) - (2/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">330 / (1/5)</gadget>
<output>1_650</output>

<result>1_650</result>