The fourth grade students participated in the tree planting activity, a total of 1000 saplings were planted. In the morning, 12 rows of 23 trees were planted, and in the afternoon, 13 rows were planted, with 28 trees in each row. How many saplings are left?
四年级学生参加植树活动，一共有1000棵树苗．上午栽了12行，每行23棵，下午栽了13行，每行28棵，还剩下多少棵树苗没栽？
<gadget id="calculator">23 * 12</gadget>
<output>276</output>

<gadget id="calculator">28 * 13</gadget>
<output>364</output>

<gadget id="calculator">276 + 364</gadget>
<output>640</output>

<gadget id="calculator">1_000 - 640</gadget>
<output>360</output>

<result>360</result>