The school cafeteria originally used 5.6 tons of rice. (1/4) of the total was used up in the first week, and (7/10) tons were used up in the second week. How many tons are left?
学校食堂原有大米5.6吨，第一周用去了总数的(1/4)，第二周用去了(7/10)吨，还剩下多少吨？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">5.6 * (1/4)</gadget>
<output>1.4</output>

<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">5.6 - 1.4 - (7/10)</gadget>
<output>3.5</output>

<result>3.5</result>