There are 150 tons of grain to be transported to the earthquake-stricken area. On the first day, (1/3) was transported away, and on the second day (2/5), the rest must be transported on the third day. How much more should be transported on the third day? Ton?
有150吨粮食要运往地震灾区，第一天运走了(1/3)，第二天运走了(2/5)，剩下的第三天必须运完，第三天还要运多少吨？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">(1/3) + (2/5)</gadget>
<output>11/15 = around 0.733333</output>

<gadget id="calculator">1 - (11/15)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">150 * (4/15)</gadget>
<output>40</output>

<result>40</result>