There is a pile of yellow sand on a certain construction site. On the first day, (1/5) more than 20 tons were used, and on the second day, 40% of the total amount was used, 35 tons less, leaving 165 tons. How many tons is this pile of sand?
某工地有一堆黄沙，第一天用去(1/5)多20吨，第二天用去总量的40%少35吨，还剩下165吨，这堆沙有多少吨？
<gadget id="calculator">165 - 15</gadget>
<output>150</output>

<gadget id="calculator">1 - 0.6</gadget>
<output>0.4</output>

<gadget id="calculator">150 / 0.4</gadget>
<output>375</output>

<result>375</result>