A batch of cement weighs 2 tons, and (3/4) tons are sold on the first day, which is (1/10) more tons than on the second day. How many tons is this batch of cement less than the original?
一批水泥重2吨，第一天卖出(3/4)吨，比第二天多卖出(1/10)吨，这批水泥比原来少了多少吨？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(3/4) - (1/10)</gadget>
<output>13/20 = around 0.65</output>

<gadget id="calculator">(3/4) + (13/20)</gadget>
<output>7/5 = around 1.4</output>

<result>7/5 = around 1.4</result>