There are 400 kilograms of pears, 40% are sold in the morning, and the rest (5/6) are sold in the afternoon. How many kilograms are still not sold?
有400千克梨，上午卖出40%，下午卖出余下的(5/6)，还有多少千克没有卖出？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(3/5) * (5/6)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (2/5) - (1/2)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">400 * (1/10)</gadget>
<output>40</output>

<result>40</result>