A pile of stones is transported to the construction site, (3/5) tons are used for building walls, (1/4) tons are used for paving the ground, and (1/10) tons is left. How many tons are there in this pile of stones?
工地运来一堆石子，砌墙用去(3/5)吨，铺地用去(1/4)吨，还剩(1/10)吨，这堆石子原来有多少吨？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

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

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

<gadget id="calculator">(3/5) + (1/4) + (1/10)</gadget>
<output>19/20 = around 0.95</output>

<result>19/20 = around 0.95</result>