A batch of fruit is 120 kilograms in total, sold (1/3) in the morning and sold (1/2) in the afternoon, how many kilograms are left unsold?
一批水果共120千克，上午卖出(1/3)，下午卖出(1/2)，还剩下多少千克没有卖？
<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 - (1/3) - (1/2)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">120 * (1/6)</gadget>
<output>20</output>

<result>20</result>