There is a batch of grain, 40% of which is transported on the first day and 35% on the second day, and 17 tons more are transported on the first day than on the second day. How many tons of this batch of grain are there in total?
有一批粮食，第一天运走40%，第二天运走35%，第一天比第二天多运走17吨，这批粮食共有多少吨？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">35 / 100</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">(2/5) - (7/20)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">17 / (1/20)</gadget>
<output>340</output>

<result>340</result>