Aunt Zhang spent (1/6) hours washing vegetables, (2/5) hours cooking, and (1/2) hours cooking soup. How many hours did Aunt Zhang spend doing these things?
张阿姨洗菜用了(1/6)小时，炒菜用了(2/5)小时，煮汤用了(1/2)小时，张阿姨做这些事一共用了多少小时？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

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

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/6) + (2/5) + (1/2)</gadget>
<output>16/15 = around 1.066667</output>

<result>16/15 = around 1.066667</result>