Uncle Wang’s family has a vegetable field, 1/3 of which is used for growing celery, and 1/2 of which is used for growing cabbage. What fraction of the land is left unplanted?
王大叔家有一块菜地，种芹菜用去了这块地的(1/3)，种白菜用去了这块地的(1/2)．还剩下这块地的几分之几没种？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">(1/3) + (1/2)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 - (5/6)</gadget>
<output>1/6 = around 0.166667</output>

<result>1/6 = around 0.166667</result>