A pile of sand is 80 tons, (1/2) is used for paving the road, and (1/4) is used for building embankments. How many tons are used in total?
一堆沙子80吨，铺路用去了(1/2)，筑堤坝用去了(1/4)，一共用去了多少吨？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">(1/2) + (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">80 * (3/4)</gadget>
<output>60</output>

<result>60</result>