A kindergarten is going to distribute pencils to 32 classes, each class has 321 pencils, and 170 pencils need to be kept for spare. How many pencils should a kindergarten buy?
某幼儿园准备发铅笔，发给32个班，每班321枝，还需留170枝备用．幼儿园应买多少枝铅笔？
<gadget id="calculator">321 * 32</gadget>
<output>10_272</output>

<gadget id="calculator">10_272 + 170</gadget>
<output>10_442</output>

<result>10_442</result>