The school cafeteria brings in (3/4) tons of rice, eats (1/8) tons in the first week, and eats (1/10) tons in the second week, how many tons are left?
学校食堂运进(3/4)吨大米，第一大周吃了(1/8)吨，第二大周吃了(1/10)吨，还剩多少吨？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

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

<gadget id="calculator">(3/4) - (1/8) - (1/10)</gadget>
<output>21/40 = around 0.525</output>

<result>21/40 = around 0.525</result>