The forest farm needs to plant a batch of fruit trees, and 30 rows have been planted, with 120 trees in each row. The task will be completed by planting another 360 trees. How many fruit trees are there in this batch?
林场要种一批果树，已经种了30排，每排120棵．再种360棵就完成任务了，这批果树共有多少棵？
<gadget id="calculator">30 * 120</gadget>
<output>3_600</output>

<gadget id="calculator">3_600 + 360</gadget>
<output>3_960</output>

<result>3_960</result>