The school plans to distribute story books to 16 classes, 230 for each class, and leave 70 as spares. How many storybooks should schools prepare?
学校准备发故事书给16个班，每班230本，还留下70本作为备用．学校应准备多少本故事书？
<gadget id="calculator">230 * 16</gadget>
<output>3_680</output>

<gadget id="calculator">3_680 + 70</gadget>
<output>3_750</output>

<result>3_750</result>