Uncle Zhang has 3 acres of paddy fields, and he plans to plant all of them with rice. All (1/3) were inserted on the first day, all (3/5) were inserted on the second day, and the rest was inserted in the morning of the third day. What fraction of all the paddy fields will be inserted in the morning of the third day?
张大爷有3亩水田，准备全部插上水稻．第一天插了全部的(1/3)，第二天插了全部的(3/5)，剩下的第三天上午插完，第三天上午要插全部水田的几分之几？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (1/3) - (3/5)</gadget>
<output>1/15 = around 0.066667</output>

<result>1/15 = around 0.066667</result>