To celebrate Children's Day, the kindergarten bought back 380 prizes, and after distributing them to 7 classes, there were still 30 prizes left. How many prizes are awarded per class on average?
庆六一活动，幼儿园买回380份奖品，分给7个班后，还剩下30份．平均每班分得奖品多少份？
<gadget id="calculator">380 - 30</gadget>
<output>350</output>

<gadget id="calculator">350 / 7</gadget>
<output>50</output>

<result>50</result>