For a batch of chemical fertilizers, 20 tons were transported for the first time, and 1/3 of the total amount was transported for the second time, leaving 35% unshipped. How many tons are there in this batch of chemical fertilizers?
一批化肥，第一次运走了20吨，第二次运走了总数的(1/3)，还剩下35%没运，这批化肥有多少吨？
<gadget id="calculator">35 / 100</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (7/20) - (1/3)</gadget>
<output>19/60 = around 0.316667</output>

<gadget id="calculator">20 / (19/60)</gadget>
<output>1_200/19 = around 63.157895</output>

<result>1_200/19 = around 63.157895</result>