Dongdong has to write 357 big characters. He has been writing for 12 days, and there are 45 left to write. How many big characters does Dongdong write on average every day?
冬冬要写357个大字，已经写了12天，还剩45个没有写，冬冬平均每天写多少个大字？
<gadget id="calculator">357 - 45</gadget>
<output>312</output>

<gadget id="calculator">312 / 12</gadget>
<output>26</output>

<result>26</result>