There is a batch of coal, (3/10) tons were transported in the first time, and (1/4) tons were transported less than the second time, how many tons were transported in total?
有一批煤，第一次运走(3/10)吨，比第二次少运走(1/4)吨，两次一共运走多少吨？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(3/10) + (1/4) + (3/10)</gadget>
<output>17/20 = around 0.85</output>

<result>17/20 = around 0.85</result>