Use a truck to transport a batch of goods, the first time to transport this batch of goods (2/3), the second time to transport this batch of goods (1/5). How much of this shipment is left unshipped?
用一辆货车运一批货物，第一次运了这批货物的(2/3)，第二次运了这批货物的(1/5)．这批货物还剩下几分之几没有运？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (2/3) - (1/5)</gadget>
<output>2/15 = around 0.133333</output>

<result>2/15 = around 0.133333</result>