There is a batch of goods, 20% of the total amount was transported on the first day, and the rest (5/8) was transported on the second day. The second day transported 195 tons more than the first day. How many tons did this batch of goods originally have? ?
有一批货物，第一天运走了总数的20%，第二天运走了余下的(5/8)，第二天比第一天多运走了195吨，这批货物原有多少吨？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">(4/5) * (5/8)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) - (1/5)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">195 / (3/10)</gadget>
<output>650</output>

<result>650</result>