The school brought a pile of sand, (2/3) tons were used to build the wall, (3/5) tons were used to repair the playground, and (1/10) tons remained. How many tons were used in total?
学校运来一堆沙子，砌墙用去(2/3)吨，修运动场用去(3/5)吨，还剩(1/10)吨，一共用去多少吨？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(2/3) + (3/5)</gadget>
<output>19/15 = around 1.266667</output>

<result>19/15 = around 1.266667</result>