The cafeteria used (3/8) tons of rice in the first week, which was (2/5) tons less than in the second week. How many tons of rice will be used on Monday?
食堂第一周用去(3/8)吨大米，比第二周少用(2/5)吨，两周一共用去多少吨大米？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/8) + (2/5)</gadget>
<output>31/40 = around 0.775</output>

<gadget id="calculator">(3/8) + (31/40)</gadget>
<output>23/20 = around 1.15</output>

<result>23/20 = around 1.15</result>