The school purchased a batch of saplings and planted 25 in each row. After planting 16 rows, there are 18 left. How many saplings are in this batch?
学校购买一批树苗，每行栽25棵，栽了16行，还剩18棵，这批树苗多少棵？
<gadget id="calculator">25 * 16</gadget>
<output>400</output>

<gadget id="calculator">400 + 18</gadget>
<output>418</output>

<result>418</result>