The landscaping team wants to plant a batch of saplings. On the first day, 15% of the total number were planted, and on the second day, 133 trees were planted. At this time, the ratio of the remaining to the number of saplings planted is 3:5. How many saplings are there in this batch? tree?
园林绿化队要栽一批树苗，第一天栽了总数的15%，第二天栽了133棵，这时剩下的与已栽的棵数比是3：5，这批树苗一共有多少棵？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/20) - (3/8)</gadget>
<output>19/40 = around 0.475</output>

<gadget id="calculator">133 / (19/40)</gadget>
<output>280</output>

<result>280</result>